feat: major content expansion with essence and crystal sinks

- 6 zones (up from 3): Shadow Marshes, Volcanic Depths, Astral Void
- 18 bosses (up from 4): 3 per zone with zone-based sequential unlock
- 24 quests (up from 9): 3-4 per zone, reorganised by zone
- 15 adventurer tiers (up from 10): Shadow Assassin through Divine Champion
- 28 equipment pieces (up from 12): boss drops + purchasable with essence/crystals
- 24 upgrades (up from 13): crystal-cost upgrades + new adventurer upgrades
- 22 achievements (up from 14): new milestones for bosses, quests, gold, armies
- Purchasable equipment system: buy items directly with essence or crystals
- Crystal-cost upgrades: spend crystals on global and click power boosts
- Zone-based boss progression: defeating a zone's last boss unlocks the next zone

apps/api/src/data/achievements.ts

@@ -1,6 +1,7 @@
 import type { Achievement } from "@elysium/types";
 
 export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
+  // Click milestones
   {
     id: "first_click",
     name: "First Strike",
@@ -28,6 +29,16 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     reward: { crystals: 100 },
     unlockedAt: null,
   },
+  {
+    id: "click_legend",
+    name: "Click Legend",
+    description: "Click the Guild Hall 10,000 times.",
+    icon: "🌩️",
+    condition: { type: "totalClicks", amount: 10_000 },
+    reward: { crystals: 300 },
+    unlockedAt: null,
+  },
+  // Gold milestones
   {
     id: "first_gold",
     name: "First Gold",
@@ -64,6 +75,16 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     reward: { crystals: 500 },
     unlockedAt: null,
   },
+  {
+    id: "trillionaire",
+    name: "Trillionaire",
+    description: "Earn 1,000,000,000,000 gold in total.",
+    icon: "💎",
+    condition: { type: "totalGoldEarned", amount: 1_000_000_000_000 },
+    reward: { crystals: 2_000 },
+    unlockedAt: null,
+  },
+  // Quest milestones
   {
     id: "first_quest",
     name: "Adventurous Spirit",
@@ -82,6 +103,16 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     reward: { crystals: 50 },
     unlockedAt: null,
   },
+  {
+    id: "quest_master",
+    name: "Quest Master",
+    description: "Complete 15 quests.",
+    icon: "🗺️",
+    condition: { type: "questsCompleted", amount: 15 },
+    reward: { crystals: 200 },
+    unlockedAt: null,
+  },
+  // Boss milestones
   {
     id: "boss_slayer",
     name: "Boss Slayer",
@@ -92,14 +123,33 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     unlockedAt: null,
   },
   {
-    id: "legendary_hunter",
+    id: "boss_veteran",
-    name: "Legendary Hunter",
+    name: "Boss Veteran",
-    description: "Defeat all four bosses.",
+    description: "Defeat 5 bosses.",
-    icon: "🏆",
+    icon: "🗡️",
-    condition: { type: "bossesDefeated", amount: 4 },
+    condition: { type: "bossesDefeated", amount: 5 },
-    reward: { crystals: 200 },
+    reward: { crystals: 150 },
     unlockedAt: null,
   },
+  {
+    id: "legendary_hunter",
+    name: "Legendary Hunter",
+    description: "Defeat 10 bosses.",
+    icon: "🏆",
+    condition: { type: "bossesDefeated", amount: 10 },
+    reward: { crystals: 500 },
+    unlockedAt: null,
+  },
+  {
+    id: "devourer_slayer",
+    name: "World Saver",
+    description: "Defeat all 18 bosses, including the Devourer of Worlds.",
+    icon: "🌟",
+    condition: { type: "bossesDefeated", amount: 18 },
+    reward: { crystals: 2_000 },
+    unlockedAt: null,
+  },
+  // Adventurer milestones
   {
     id: "guild_master",
     name: "Guild Master",
@@ -118,6 +168,16 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     reward: { crystals: 200 },
     unlockedAt: null,
   },
+  {
+    id: "army_legend",
+    name: "Legendary Commander",
+    description: "Recruit a total of 5,000 adventurers.",
+    icon: "⚜️",
+    condition: { type: "adventurerTotal", amount: 5_000 },
+    reward: { crystals: 750 },
+    unlockedAt: null,
+  },
+  // Prestige milestones
   {
     id: "first_prestige",
     name: "Born Again",
@@ -127,6 +187,7 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     reward: { crystals: 100 },
     unlockedAt: null,
   },
+  // Collection milestones
   {
     id: "collector",
     name: "Collector",
@@ -136,4 +197,13 @@ export const DEFAULT_ACHIEVEMENTS: Achievement[] = [
     reward: { crystals: 10 },
     unlockedAt: null,
   },
+  {
+    id: "arsenal",
+    name: "Arsenal",
+    description: "Own 12 pieces of equipment.",
+    icon: "🗃️",
+    condition: { type: "equipmentOwned", amount: 12 },
+    reward: { crystals: 200 },
+    unlockedAt: null,
+  },
 ];

apps/api/src/data/adventurers.ts

@@ -111,4 +111,59 @@ export const DEFAULT_ADVENTURERS: Adventurer[] = [
     count: 0,
     unlocked: false,
   },
+  {
+    id: "shadow_assassin",
+    name: "Shadow Assassin",
+    class: "rogue",
+    level: 11,
+    goldPerSecond: 5_000,
+    essencePerSecond: 6,
+    combatPower: 18_000,
+    count: 0,
+    unlocked: false,
+  },
+  {
+    id: "arcane_scholar",
+    name: "Arcane Scholar",
+    class: "mage",
+    level: 12,
+    goldPerSecond: 14_000,
+    essencePerSecond: 15,
+    combatPower: 45_000,
+    count: 0,
+    unlocked: false,
+  },
+  {
+    id: "void_walker",
+    name: "Void Walker",
+    class: "rogue",
+    level: 13,
+    goldPerSecond: 40_000,
+    essencePerSecond: 35,
+    combatPower: 130_000,
+    count: 0,
+    unlocked: false,
+  },
+  {
+    id: "celestial_guard",
+    name: "Celestial Guard",
+    class: "paladin",
+    level: 14,
+    goldPerSecond: 120_000,
+    essencePerSecond: 100,
+    combatPower: 400_000,
+    count: 0,
+    unlocked: false,
+  },
+  {
+    id: "divine_champion",
+    name: "Divine Champion",
+    class: "warrior",
+    level: 15,
+    goldPerSecond: 400_000,
+    essencePerSecond: 300,
+    combatPower: 1_200_000,
+    count: 0,
+    unlocked: false,
+  },
 ];

apps/api/src/data/bosses.ts

@@ -1,6 +1,7 @@
 import type { Boss } from "@elysium/types";
 
 export const DEFAULT_BOSSES: Boss[] = [
+  // ── Verdant Vale ──────────────────────────────────────────────────────────
   {
     id: "troll_king",
     name: "The Troll King",
@@ -35,38 +36,281 @@ export const DEFAULT_BOSSES: Boss[] = [
     prestigeRequirement: 0,
     zoneId: "verdant_vale",
   },
+  {
+    id: "forest_giant",
+    name: "The Forest Giant",
+    description:
+      "An ancient colossus of bark and stone who has slumbered beneath the Vale for centuries. Its awakening spells disaster for every settlement in the region.",
+    status: "locked",
+    maxHp: 35_000,
+    currentHp: 35_000,
+    damagePerSecond: 40,
+    goldReward: 350_000,
+    essenceReward: 400,
+    crystalReward: 20,
+    upgradeRewards: ["archmage_1"],
+    equipmentRewards: ["hide_armour", "rune_stone"],
+    prestigeRequirement: 0,
+    zoneId: "verdant_vale",
+  },
+  // ── Shattered Ruins ───────────────────────────────────────────────────────
+  {
+    id: "stone_golem",
+    name: "The Stone Golem",
+    description:
+      "A guardian construct from the fallen civilisation, still faithfully protecting the ruins of a city long since turned to dust.",
+    status: "locked",
+    maxHp: 60_000,
+    currentHp: 60_000,
+    damagePerSecond: 60,
+    goldReward: 600_000,
+    essenceReward: 600,
+    crystalReward: 25,
+    upgradeRewards: ["paladin_1"],
+    equipmentRewards: [],
+    prestigeRequirement: 0,
+    zoneId: "shattered_ruins",
+  },
+  {
+    id: "bone_colossus",
+    name: "The Bone Colossus",
+    description:
+      "Forged from the skeletons of a thousand fallen warriors by the Lich Queen's disciples. Its hollow eye sockets blaze with the same sorcery that animated them.",
+    status: "locked",
+    maxHp: 200_000,
+    currentHp: 200_000,
+    damagePerSecond: 120,
+    goldReward: 2_000_000,
+    essenceReward: 1_500,
+    crystalReward: 60,
+    upgradeRewards: ["essence_guild"],
+    equipmentRewards: ["frost_rune"],
+    prestigeRequirement: 0,
+    zoneId: "shattered_ruins",
+  },
   {
     id: "elder_dragon",
     name: "Elder Dragon Vaeltharox",
     description:
       "The eldest dragon in existence, older than the kingdom itself. Even his breath can level mountains.",
     status: "locked",
-    maxHp: 100_000,
+    maxHp: 500_000,
-    currentHp: 100_000,
+    currentHp: 500_000,
-    damagePerSecond: 75,
+    damagePerSecond: 200,
-    goldReward: 1_000_000,
+    goldReward: 5_000_000,
-    essenceReward: 1_000,
+    essenceReward: 3_000,
-    crystalReward: 50,
+    crystalReward: 100,
     upgradeRewards: ["click_3"],
     equipmentRewards: ["vorpal_sword", "dragon_scale"],
     prestigeRequirement: 1,
     zoneId: "shattered_ruins",
   },
+  // ── Shadow Marshes ────────────────────────────────────────────────────────
+  {
+    id: "swamp_witch",
+    name: "Morgantha the Swamp Witch",
+    description:
+      "She has hexed villages for three centuries from her hut on the black water. Her curse-weaving is second to none — but so is the bounty on her head.",
+    status: "locked",
+    maxHp: 80_000,
+    currentHp: 80_000,
+    damagePerSecond: 80,
+    goldReward: 800_000,
+    essenceReward: 800,
+    crystalReward: 30,
+    upgradeRewards: ["shadow_assassin_1"],
+    equipmentRewards: [],
+    prestigeRequirement: 0,
+    zoneId: "shadow_marshes",
+  },
+  {
+    id: "plague_lord",
+    name: "The Plague Lord",
+    description:
+      "A bloated, rotting horror that spreads pestilence wherever it walks. Entire kingdoms have fallen to the disease it carries. Yours will not.",
+    status: "locked",
+    maxHp: 300_000,
+    currentHp: 300_000,
+    damagePerSecond: 180,
+    goldReward: 3_000_000,
+    essenceReward: 2_000,
+    crystalReward: 80,
+    upgradeRewards: ["grand_council"],
+    equipmentRewards: ["runestone_amulet"],
+    prestigeRequirement: 0,
+    zoneId: "shadow_marshes",
+  },
+  {
+    id: "mud_kraken",
+    name: "The Mud Kraken",
+    description:
+      "An eldritch leviathan that lurks in the deepest part of the marshes, older than the gods themselves. Its tentacles have dragged ships — and armies — into the mire.",
+    status: "locked",
+    maxHp: 800_000,
+    currentHp: 800_000,
+    damagePerSecond: 350,
+    goldReward: 8_000_000,
+    essenceReward: 4_000,
+    crystalReward: 150,
+    upgradeRewards: ["arcane_scholar_1"],
+    equipmentRewards: ["crystal_shard"],
+    prestigeRequirement: 1,
+    zoneId: "shadow_marshes",
+  },
+  // ── Frozen Peaks ──────────────────────────────────────────────────────────
+  {
+    id: "frost_wyrm",
+    name: "The Frost Wyrm",
+    description:
+      "A serpentine dragon of pure ice who has hunted the tundra for aeons. Its breath flash-freezes anything it touches, and it has never known defeat.",
+    status: "locked",
+    maxHp: 500_000,
+    currentHp: 500_000,
+    damagePerSecond: 220,
+    goldReward: 5_000_000,
+    essenceReward: 3_500,
+    crystalReward: 100,
+    upgradeRewards: ["dragon_rider_1"],
+    equipmentRewards: [],
+    prestigeRequirement: 1,
+    zoneId: "frozen_peaks",
+  },
+  {
+    id: "ice_queen",
+    name: "The Ice Queen",
+    description:
+      "A sorceress who made a pact with the winter itself and was transformed into something no longer mortal. She rules the Frozen Peaks from a palace of living ice.",
+    status: "locked",
+    maxHp: 1_500_000,
+    currentHp: 1_500_000,
+    damagePerSecond: 500,
+    goldReward: 15_000_000,
+    essenceReward: 8_000,
+    crystalReward: 250,
+    upgradeRewards: ["void_walker_1"],
+    equipmentRewards: ["frost_crystal"],
+    prestigeRequirement: 2,
+    zoneId: "frozen_peaks",
+  },
   {
     id: "void_titan",
     name: "The Void Titan",
     description:
       "A creature from beyond the veil of reality, drawn by the power your guild has accumulated. It must not be allowed to exist.",
     status: "locked",
-    maxHp: 1_000_000,
+    maxHp: 5_000_000,
-    currentHp: 1_000_000,
+    currentHp: 5_000_000,
-    damagePerSecond: 250,
+    damagePerSecond: 1_200,
-    goldReward: 10_000_000,
+    goldReward: 50_000_000,
-    essenceReward: 5_000,
+    essenceReward: 20_000,
-    crystalReward: 200,
+    crystalReward: 500,
     upgradeRewards: [],
     equipmentRewards: ["philosophers_stone"],
     prestigeRequirement: 3,
     zoneId: "frozen_peaks",
   },
+  // ── Volcanic Depths ───────────────────────────────────────────────────────
+  {
+    id: "fire_elemental",
+    name: "The Ancient Fire Elemental",
+    description:
+      "Born from the first volcanic eruption the world ever knew. It exists purely to consume, and your guild looks like the finest kindling it has seen in millennia.",
+    status: "locked",
+    maxHp: 1_000_000,
+    currentHp: 1_000_000,
+    damagePerSecond: 400,
+    goldReward: 10_000_000,
+    essenceReward: 6_000,
+    crystalReward: 150,
+    upgradeRewards: ["celestial_guard_1"],
+    equipmentRewards: ["flame_lance"],
+    prestigeRequirement: 2,
+    zoneId: "volcanic_depths",
+  },
+  {
+    id: "magma_titan",
+    name: "The Magma Titan",
+    description:
+      "Half-giant, half-living volcano, this colossus was created by the fire elementals to guard their greatest forge. Every strike from its fists sends shockwaves through the earth.",
+    status: "locked",
+    maxHp: 4_000_000,
+    currentHp: 4_000_000,
+    damagePerSecond: 1_000,
+    goldReward: 40_000_000,
+    essenceReward: 15_000,
+    crystalReward: 400,
+    upgradeRewards: ["crystal_resonance"],
+    equipmentRewards: ["volcanic_plate"],
+    prestigeRequirement: 3,
+    zoneId: "volcanic_depths",
+  },
+  {
+    id: "phoenix_lord",
+    name: "The Phoenix Lord",
+    description:
+      "The apex predator of the volcanic chain — a being of pure flame that has died and reborn itself more times than recorded history. This time, it will not rise again.",
+    status: "locked",
+    maxHp: 12_000_000,
+    currentHp: 12_000_000,
+    damagePerSecond: 2_500,
+    goldReward: 120_000_000,
+    essenceReward: 40_000,
+    crystalReward: 800,
+    upgradeRewards: ["crystal_mastery"],
+    equipmentRewards: ["eternal_flame"],
+    prestigeRequirement: 4,
+    zoneId: "volcanic_depths",
+  },
+  // ── Astral Void ───────────────────────────────────────────────────────────
+  {
+    id: "astral_wraith",
+    name: "The Astral Wraith",
+    description:
+      "A being of pure psychic energy who has haunted the space between stars since before the world was formed. It feeds on consciousness itself.",
+    status: "locked",
+    maxHp: 20_000_000,
+    currentHp: 20_000_000,
+    damagePerSecond: 4_000,
+    goldReward: 200_000_000,
+    essenceReward: 60_000,
+    crystalReward: 1_000,
+    upgradeRewards: ["divine_champion_1"],
+    equipmentRewards: ["astral_robe"],
+    prestigeRequirement: 4,
+    zoneId: "astral_void",
+  },
+  {
+    id: "cosmic_horror",
+    name: "The Cosmic Horror",
+    description:
+      "A god-thing from before the age of mortals. Its true form cannot be perceived without madness — what you see is a mercy granted by the universe itself.",
+    status: "locked",
+    maxHp: 75_000_000,
+    currentHp: 75_000_000,
+    damagePerSecond: 10_000,
+    goldReward: 750_000_000,
+    essenceReward: 150_000,
+    crystalReward: 2_500,
+    upgradeRewards: ["crystal_focus"],
+    equipmentRewards: ["celestial_blade"],
+    prestigeRequirement: 5,
+    zoneId: "astral_void",
+  },
+  {
+    id: "the_devourer",
+    name: "The Devourer of Worlds",
+    description:
+      "The end. The hunger at the heart of existence that has unmade countless realities before this one. Your guild stands between it and everything that has ever lived.",
+    status: "locked",
+    maxHp: 300_000_000,
+    currentHp: 300_000_000,
+    damagePerSecond: 30_000,
+    goldReward: 3_000_000_000,
+    essenceReward: 500_000,
+    crystalReward: 10_000,
+    upgradeRewards: [],
+    equipmentRewards: ["infinity_gem"],
+    prestigeRequirement: 6,
+    zoneId: "astral_void",
+  },
 ];

apps/api/src/data/equipment.ts

@@ -1,7 +1,7 @@
 import type { Equipment } from "@elysium/types";
 
 export const DEFAULT_EQUIPMENT: Equipment[] = [
-  // Weapons — drop from bosses; common starts owned
+  // ── Weapons ───────────────────────────────────────────────────────────────
   {
     id: "rusty_sword",
     name: "Rusty Sword",
@@ -32,6 +32,27 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
+  {
+    id: "shadow_dagger",
+    name: "Shadow Dagger",
+    description: "Forged in the Shadow Marshes from condensed darkness. It strikes before it is seen.",
+    type: "weapon",
+    rarity: "epic",
+    bonus: { combatMultiplier: 1.65 },
+    owned: false,
+    equipped: false,
+    cost: { gold: 0, essence: 500, crystals: 0 },
+  },
+  {
+    id: "flame_lance",
+    name: "Flame Lance",
+    description: "A spear tipped with a shard of the Primordial Forge's eternal fire.",
+    type: "weapon",
+    rarity: "epic",
+    bonus: { combatMultiplier: 1.7 },
+    owned: false,
+    equipped: false,
+  },
   {
     id: "vorpal_sword",
     name: "Vorpal Sword",
@@ -42,7 +63,39 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
-  // Armour — drop from bosses; common starts owned
+  {
+    id: "soul_reaper",
+    name: "Soul Reaper",
+    description: "A scythe that harvests not flesh but essence itself. Every swing drains the will to resist.",
+    type: "weapon",
+    rarity: "legendary",
+    bonus: { combatMultiplier: 2.5 },
+    owned: false,
+    equipped: false,
+    cost: { gold: 0, essence: 0, crystals: 300 },
+  },
+  {
+    id: "celestial_blade",
+    name: "Celestial Blade",
+    description: "Forged from the heart of a dying star by the Cosmic Horror itself. Its edge exists in three realities simultaneously.",
+    type: "weapon",
+    rarity: "legendary",
+    bonus: { combatMultiplier: 3.0 },
+    owned: false,
+    equipped: false,
+  },
+  {
+    id: "void_edge",
+    name: "Void Edge",
+    description: "A blade made of compressed nothingness. It does not cut — it simply unmakes.",
+    type: "weapon",
+    rarity: "legendary",
+    bonus: { combatMultiplier: 2.75 },
+    owned: false,
+    equipped: false,
+    cost: { gold: 0, essence: 2_000, crystals: 500 },
+  },
+  // ── Armour ────────────────────────────────────────────────────────────────
   {
     id: "leather_armour",
     name: "Leather Armour",
@@ -63,6 +116,16 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
+  {
+    id: "hide_armour",
+    name: "Giant's Hide Armour",
+    description: "Cured hide from a Forest Giant, worked into armour that radiates primal authority.",
+    type: "armour",
+    rarity: "rare",
+    bonus: { goldMultiplier: 1.35 },
+    owned: false,
+    equipped: false,
+  },
   {
     id: "plate_armour",
     name: "Plate Armour",
@@ -73,6 +136,27 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
+  {
+    id: "void_shroud",
+    name: "Void Shroud",
+    description: "A cloak woven from the fabric of the Shadow Marshes itself. Wealth flows to those hidden from sight.",
+    type: "armour",
+    rarity: "epic",
+    bonus: { goldMultiplier: 1.75 },
+    owned: false,
+    equipped: false,
+    cost: { gold: 0, essence: 400, crystals: 0 },
+  },
+  {
+    id: "volcanic_plate",
+    name: "Volcanic Plate",
+    description: "Armour quenched in magma that hardened into something neither metal nor stone. Burns with inner heat.",
+    type: "armour",
+    rarity: "epic",
+    bonus: { goldMultiplier: 1.65, combatMultiplier: 1.15 },
+    owned: false,
+    equipped: false,
+  },
   {
     id: "dragon_scale",
     name: "Dragon Scale Armour",
@@ -83,7 +167,28 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
-  // Trinkets — drop from bosses; common starts owned
+  {
+    id: "titan_aegis",
+    name: "Titan's Aegis",
+    description: "A shield-armour hybrid blessed by the celestials. Its bearer becomes a fortress.",
+    type: "armour",
+    rarity: "legendary",
+    bonus: { goldMultiplier: 2.5 },
+    owned: false,
+    equipped: false,
+    cost: { gold: 0, essence: 0, crystals: 250 },
+  },
+  {
+    id: "astral_robe",
+    name: "Astral Robe",
+    description: "Woven from threads of pure starlight harvested by the Astral Wraith. Income flows like cosmic energy.",
+    type: "armour",
+    rarity: "legendary",
+    bonus: { goldMultiplier: 2.25 },
+    owned: false,
+    equipped: false,
+  },
+  // ── Trinkets ──────────────────────────────────────────────────────────────
   {
     id: "lucky_coin",
     name: "Lucky Coin",
@@ -104,6 +209,16 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
+  {
+    id: "frost_rune",
+    name: "Frost Rune",
+    description: "A rune carved from bone-ice by the Bone Colossus. It amplifies strikes with cold precision.",
+    type: "trinket",
+    rarity: "rare",
+    bonus: { clickMultiplier: 1.3 },
+    owned: false,
+    equipped: false,
+  },
   {
     id: "arcane_orb",
     name: "Arcane Orb",
@@ -114,6 +229,47 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
+  {
+    id: "runestone_amulet",
+    name: "Runestone Amulet",
+    description: "An amulet carved from ancient runestones found in the plague ruins. Its inscriptions hum with forgotten power.",
+    type: "trinket",
+    rarity: "epic",
+    bonus: { clickMultiplier: 1.45, goldMultiplier: 1.15 },
+    owned: false,
+    equipped: false,
+  },
+  {
+    id: "crystal_shard",
+    name: "Crystal Shard",
+    description: "A fragment of the Mud Kraken's crystallised essence. Focuses raw power into devastating strikes.",
+    type: "trinket",
+    rarity: "epic",
+    bonus: { clickMultiplier: 1.55, goldMultiplier: 1.1 },
+    owned: false,
+    equipped: false,
+  },
+  {
+    id: "void_compass",
+    name: "Void Compass",
+    description: "A compass that points not north but toward the greatest concentration of power — wherever that may be.",
+    type: "trinket",
+    rarity: "epic",
+    bonus: { clickMultiplier: 1.6 },
+    owned: false,
+    equipped: false,
+    cost: { gold: 0, essence: 350, crystals: 0 },
+  },
+  {
+    id: "frost_crystal",
+    name: "Frost Crystal",
+    description: "A perfectly formed crystal harvested from the Ice Queen's throne room. Cold enough to burn.",
+    type: "trinket",
+    rarity: "legendary",
+    bonus: { clickMultiplier: 2.0, goldMultiplier: 1.2 },
+    owned: false,
+    equipped: false,
+  },
   {
     id: "philosophers_stone",
     name: "Philosopher's Stone",
@@ -124,4 +280,24 @@ export const DEFAULT_EQUIPMENT: Equipment[] = [
     owned: false,
     equipped: false,
   },
+  {
+    id: "eternal_flame",
+    name: "Eternal Flame",
+    description: "A flame that has never been extinguished, sealed in crystal by the Phoenix Lord. It burns with the power of rebirth.",
+    type: "trinket",
+    rarity: "legendary",
+    bonus: { clickMultiplier: 2.25, goldMultiplier: 1.15 },
+    owned: false,
+    equipped: false,
+  },
+  {
+    id: "infinity_gem",
+    name: "Infinity Gem",
+    description: "A gem that contains a universe within it. Those who hold it become more than mortal.",
+    type: "trinket",
+    rarity: "legendary",
+    bonus: { clickMultiplier: 2.5, goldMultiplier: 1.3, combatMultiplier: 1.25 },
+    owned: false,
+    equipped: false,
+  },
 ];

apps/api/src/data/quests.ts

@@ -1,6 +1,7 @@
 import type { Quest } from "@elysium/types";
 
 export const DEFAULT_QUESTS: Quest[] = [
+  // ── Verdant Vale ──────────────────────────────────────────────────────────
   {
     id: "first_steps",
     name: "First Steps",
@@ -37,21 +38,6 @@ export const DEFAULT_QUESTS: Quest[] = [
     prerequisiteIds: ["goblin_camp"],
     zoneId: "verdant_vale",
   },
-  {
-    id: "necromancer_tower",
-    name: "Necromancer's Tower",
-    description:
-      "A rogue necromancer has raised an army of skeletons near the city. Silence him before the dead overrun us.",
-    status: "locked",
-    durationSeconds: 25 * 60,
-    rewards: [
-      { type: "gold", amount: 15_000 },
-      { type: "essence", amount: 20 },
-      { type: "upgrade", targetId: "cleric_1" },
-    ],
-    prerequisiteIds: ["haunted_mine"],
-    zoneId: "verdant_vale",
-  },
   {
     id: "ancient_ruins",
     name: "Ancient Ruins",
@@ -65,6 +51,68 @@ export const DEFAULT_QUESTS: Quest[] = [
     prerequisiteIds: ["haunted_mine"],
     zoneId: "verdant_vale",
   },
+  // ── Shattered Ruins ───────────────────────────────────────────────────────
+  {
+    id: "necromancer_tower",
+    name: "Necromancer's Tower",
+    description:
+      "A rogue necromancer has raised an army of skeletons near the city. Silence him before the dead overrun us.",
+    status: "locked",
+    durationSeconds: 25 * 60,
+    rewards: [
+      { type: "gold", amount: 15_000 },
+      { type: "essence", amount: 20 },
+      { type: "upgrade", targetId: "cleric_1" },
+    ],
+    prerequisiteIds: [],
+    zoneId: "shattered_ruins",
+  },
+  {
+    id: "crumbling_fortress",
+    name: "The Crumbling Fortress",
+    description:
+      "An ancient fortress still garrisoned by constructs who don't know the war ended. Clear it out and claim its vaults.",
+    status: "locked",
+    durationSeconds: 45 * 60,
+    rewards: [
+      { type: "gold", amount: 80_000 },
+      { type: "essence", amount: 120 },
+      { type: "upgrade", targetId: "scout_1" },
+    ],
+    prerequisiteIds: ["necromancer_tower"],
+    zoneId: "shattered_ruins",
+  },
+  {
+    id: "cursed_library",
+    name: "The Cursed Library",
+    description:
+      "A vast library sealed for centuries whose contents have warped and grown hostile. The knowledge within is priceless.",
+    status: "locked",
+    durationSeconds: 60 * 60,
+    rewards: [
+      { type: "essence", amount: 300 },
+      { type: "crystals", amount: 30 },
+      { type: "upgrade", targetId: "mage_1" },
+    ],
+    prerequisiteIds: ["crumbling_fortress"],
+    zoneId: "shattered_ruins",
+  },
+  {
+    id: "dragon_lair",
+    name: "Dragon's Lair",
+    description:
+      "The legendary lair of Pyraxis the Undying. Few who enter return — those who do are rich beyond imagining.",
+    status: "locked",
+    durationSeconds: 90 * 60,
+    rewards: [
+      { type: "gold", amount: 500_000 },
+      { type: "crystals", amount: 50 },
+      { type: "adventurer", targetId: "dragon_rider" },
+    ],
+    prerequisiteIds: ["cursed_library"],
+    zoneId: "shattered_ruins",
+  },
+  // ── Shadow Marshes ────────────────────────────────────────────────────────
   {
     id: "shadow_mere",
     name: "The Shadow Mere",
@@ -74,26 +122,56 @@ export const DEFAULT_QUESTS: Quest[] = [
     durationSeconds: 45 * 60,
     rewards: [
       { type: "essence", amount: 150 },
-      { type: "upgrade", targetId: "scout_1" },
+      { type: "upgrade", targetId: "militia_1" },
     ],
-    prerequisiteIds: ["ancient_ruins"],
+    prerequisiteIds: [],
-    zoneId: "shattered_ruins",
+    zoneId: "shadow_marshes",
   },
   {
-    id: "dragon_lair",
+    id: "witch_coven",
-    name: "Dragon's Lair",
+    name: "The Witch Coven",
     description:
-      "The legendary lair of Pyraxis the Undying. Few who enter return — those who do are rich beyond imagining.",
+      "Deep in the marshes, a coven of swamp witches performs rites that twist the very land. Their power must be broken.",
     status: "locked",
-    durationSeconds: 60 * 60,
+    durationSeconds: 90 * 60,
     rewards: [
-      { type: "gold", amount: 500_000 },
+      { type: "essence", amount: 500 },
-      { type: "crystals", amount: 50 },
+      { type: "adventurer", targetId: "shadow_assassin" },
-      { type: "adventurer", targetId: "dragon_rider" },
     ],
-    prerequisiteIds: ["ancient_ruins"],
+    prerequisiteIds: ["shadow_mere"],
-    zoneId: "shattered_ruins",
+    zoneId: "shadow_marshes",
   },
+  {
+    id: "sunken_temple",
+    name: "The Sunken Temple",
+    description:
+      "An ancient temple half-submerged in black water, its altars still humming with the power of a god long since departed.",
+    status: "locked",
+    durationSeconds: 2 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 2_000_000 },
+      { type: "crystals", amount: 75 },
+      { type: "upgrade", targetId: "knight_1" },
+    ],
+    prerequisiteIds: ["witch_coven"],
+    zoneId: "shadow_marshes",
+  },
+  {
+    id: "plague_ruins",
+    name: "The Plague Ruins",
+    description:
+      "A city that died overnight, its streets still thick with something no healer can identify. Treasures lie unclaimed among the bones.",
+    status: "locked",
+    durationSeconds: 3 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 8_000_000 },
+      { type: "essence", amount: 2_000 },
+      { type: "crystals", amount: 150 },
+    ],
+    prerequisiteIds: ["sunken_temple"],
+    zoneId: "shadow_marshes",
+  },
+  // ── Frozen Peaks ──────────────────────────────────────────────────────────
   {
     id: "frozen_wastes",
     name: "The Frozen Wastes",
@@ -102,13 +180,104 @@ export const DEFAULT_QUESTS: Quest[] = [
     status: "locked",
     durationSeconds: 2 * 60 * 60,
     rewards: [
-      { type: "gold", amount: 2_000_000 },
+      { type: "gold", amount: 5_000_000 },
-      { type: "crystals", amount: 150 },
+      { type: "crystals", amount: 100 },
       { type: "upgrade", targetId: "global_3" },
     ],
-    prerequisiteIds: ["dragon_lair"],
+    prerequisiteIds: [],
     zoneId: "frozen_peaks",
   },
+  {
+    id: "ice_caves",
+    name: "The Ice Caves",
+    description:
+      "A labyrinthine network of crystal caverns that descend for miles. The cold here is a presence, not just a temperature.",
+    status: "locked",
+    durationSeconds: 3 * 60 * 60,
+    rewards: [
+      { type: "essence", amount: 5_000 },
+      { type: "crystals", amount: 200 },
+      { type: "adventurer", targetId: "arcane_scholar" },
+    ],
+    prerequisiteIds: ["frozen_wastes"],
+    zoneId: "frozen_peaks",
+  },
+  {
+    id: "storm_citadel",
+    name: "The Storm Citadel",
+    description:
+      "A fortress suspended in a permanent blizzard, built by a mage who wanted to be left alone — and succeeded for three hundred years.",
+    status: "locked",
+    durationSeconds: 5 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 30_000_000 },
+      { type: "essence", amount: 10_000 },
+      { type: "upgrade", targetId: "peasant_1" },
+    ],
+    prerequisiteIds: ["ice_caves"],
+    zoneId: "frozen_peaks",
+  },
+  // ── Volcanic Depths ───────────────────────────────────────────────────────
+  {
+    id: "lava_flows",
+    name: "The Lava Flows",
+    description:
+      "A river of molten rock that flows without end through the volcanic tunnels. Something valuable gleams in the depths.",
+    status: "locked",
+    durationSeconds: 3 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 15_000_000 },
+      { type: "essence", amount: 4_000 },
+    ],
+    prerequisiteIds: [],
+    zoneId: "volcanic_depths",
+  },
+  {
+    id: "fire_temple",
+    name: "The Temple of the Flame",
+    description:
+      "A vast shrine where fire elementals perform rituals that shake the mountains. Whatever they worship, it has answered.",
+    status: "locked",
+    durationSeconds: 5 * 60 * 60,
+    rewards: [
+      { type: "essence", amount: 12_000 },
+      { type: "crystals", amount: 300 },
+      { type: "adventurer", targetId: "void_walker" },
+    ],
+    prerequisiteIds: ["lava_flows"],
+    zoneId: "volcanic_depths",
+  },
+  {
+    id: "magma_caverns",
+    name: "The Magma Caverns",
+    description:
+      "Kilometres of tunnels filled with rivers of fire and creatures born from the earth's core. The heat alone should kill you. Somehow, it won't.",
+    status: "locked",
+    durationSeconds: 7 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 100_000_000 },
+      { type: "essence", amount: 25_000 },
+      { type: "crystals", amount: 600 },
+    ],
+    prerequisiteIds: ["fire_temple"],
+    zoneId: "volcanic_depths",
+  },
+  {
+    id: "the_forge",
+    name: "The Primordial Forge",
+    description:
+      "The oldest forge in existence, where the fire elementals crafted weapons for gods. Its secrets could revolutionise your guild's arsenal.",
+    status: "locked",
+    durationSeconds: 10 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 500_000_000 },
+      { type: "essence", amount: 80_000 },
+      { type: "adventurer", targetId: "celestial_guard" },
+    ],
+    prerequisiteIds: ["magma_caverns"],
+    zoneId: "volcanic_depths",
+  },
+  // ── Astral Void ───────────────────────────────────────────────────────────
   {
     id: "void_rift",
     name: "Void Rift",
@@ -119,9 +288,53 @@ export const DEFAULT_QUESTS: Quest[] = [
     rewards: [
       { type: "crystals", amount: 500 },
       { type: "essence", amount: 5_000 },
-      { type: "upgrade", targetId: "knight_1" },
     ],
-    prerequisiteIds: ["frozen_wastes"],
+    prerequisiteIds: [],
-    zoneId: "frozen_peaks",
+    zoneId: "astral_void",
+  },
+  {
+    id: "star_graveyard",
+    name: "The Star Graveyard",
+    description:
+      "A field of dead stars, each one larger than a planet, each one cold and silent where once they burned with the light of creation.",
+    status: "locked",
+    durationSeconds: 8 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 1_000_000_000 },
+      { type: "essence", amount: 100_000 },
+      { type: "crystals", amount: 1_000 },
+    ],
+    prerequisiteIds: ["void_rift"],
+    zoneId: "astral_void",
+  },
+  {
+    id: "between_worlds",
+    name: "Between Worlds",
+    description:
+      "The space between realities, where the rules that govern your world do not apply. Time is meaningless here. Power is everything.",
+    status: "locked",
+    durationSeconds: 12 * 60 * 60,
+    rewards: [
+      { type: "essence", amount: 250_000 },
+      { type: "crystals", amount: 2_000 },
+      { type: "adventurer", targetId: "divine_champion" },
+    ],
+    prerequisiteIds: ["star_graveyard"],
+    zoneId: "astral_void",
+  },
+  {
+    id: "the_end",
+    name: "The End of All Things",
+    description:
+      "There is nothing beyond this point. Only the greatest guild in the history of all existence could reach here — and you have.",
+    status: "locked",
+    durationSeconds: 24 * 60 * 60,
+    rewards: [
+      { type: "gold", amount: 10_000_000_000 },
+      { type: "essence", amount: 1_000_000 },
+      { type: "crystals", amount: 10_000 },
+    ],
+    prerequisiteIds: ["between_worlds"],
+    zoneId: "astral_void",
   },
 ];

apps/api/src/data/upgrades.ts

@@ -1,7 +1,7 @@
 import type { Upgrade } from "@elysium/types";
 
 export const DEFAULT_UPGRADES: Upgrade[] = [
-  // Click upgrades
+  // ── Click upgrades ────────────────────────────────────────────────────────
   {
     id: "click_1",
     name: "Keen Eye",
@@ -10,6 +10,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 100,
     costEssence: 0,
+    costCrystals: 0,
     purchased: false,
     unlocked: true,
   },
@@ -19,8 +20,9 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     description: "Years of combat sharpen your instincts. Doubles click power again.",
     target: "click",
     multiplier: 2,
-    costGold: 1000,
+    costGold: 1_000,
     costEssence: 0,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -32,10 +34,23 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 3,
     costGold: 50_000,
     costEssence: 10,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
-  // Global upgrades
+  {
+    id: "crystal_focus",
+    name: "Crystal Focus",
+    description: "Channel crystallised power into every strike. Doubles click power.",
+    target: "click",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 100,
+    purchased: false,
+    unlocked: true,
+  },
+  // ── Global gold upgrades ──────────────────────────────────────────────────
   {
     id: "global_1",
     name: "Guild Charter",
@@ -44,6 +59,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 1.25,
     costGold: 500,
     costEssence: 0,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -55,6 +71,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 1.5,
     costGold: 10_000,
     costEssence: 5,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -66,10 +83,59 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 1_000_000,
     costEssence: 100,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
-  // Adventurer-specific upgrades
+  {
+    id: "essence_guild",
+    name: "Essence Guild",
+    description: "Forge partnerships with mage guilds across the realm. All income +50%.",
+    target: "global",
+    multiplier: 1.5,
+    costGold: 50_000,
+    costEssence: 50,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "grand_council",
+    name: "Grand Council",
+    description: "A council of the realm's greatest minds organises your operations. All income doubled.",
+    target: "global",
+    multiplier: 2,
+    costGold: 500_000,
+    costEssence: 250,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "crystal_resonance",
+    name: "Crystal Resonance",
+    description: "Align crystalline frequencies across your guild. All income +50%.",
+    target: "global",
+    multiplier: 1.5,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 250,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "crystal_mastery",
+    name: "Crystal Mastery",
+    description: "Master the art of crystal amplification. All income doubled.",
+    target: "global",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 600,
+    purchased: false,
+    unlocked: false,
+  },
+  // ── Adventurer-specific upgrades ──────────────────────────────────────────
   {
     id: "peasant_1",
     name: "Better Tools",
@@ -79,6 +145,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 200,
     costEssence: 0,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -91,6 +158,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 1_000,
     costEssence: 0,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -103,6 +171,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 5_000,
     costEssence: 2,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -115,6 +184,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 8_000,
     costEssence: 3,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -127,6 +197,7 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 15_000,
     costEssence: 5,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },
@@ -139,6 +210,111 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     multiplier: 2,
     costGold: 50_000,
     costEssence: 10,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "archmage_1",
+    name: "Leyline Binding",
+    description: "Tap into the world's leylines to double archmage output.",
+    target: "adventurer",
+    adventurerId: "archmage",
+    multiplier: 2,
+    costGold: 100_000,
+    costEssence: 75,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "paladin_1",
+    name: "Holy Vanguard",
+    description: "Divine blessings from the gods themselves double paladin output.",
+    target: "adventurer",
+    adventurerId: "paladin",
+    multiplier: 2,
+    costGold: 200_000,
+    costEssence: 150,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "dragon_rider_1",
+    name: "Bond of Wings",
+    description: "The unbreakable bond between rider and dragon doubles their combined output.",
+    target: "adventurer",
+    adventurerId: "dragon_rider",
+    multiplier: 2,
+    costGold: 500_000,
+    costEssence: 200,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "shadow_assassin_1",
+    name: "Shadow Arts",
+    description: "Mastery of the shadow arts doubles assassin effectiveness.",
+    target: "adventurer",
+    adventurerId: "shadow_assassin",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 50,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "arcane_scholar_1",
+    name: "Ancient Tomes",
+    description: "Access to forbidden libraries doubles scholar output.",
+    target: "adventurer",
+    adventurerId: "arcane_scholar",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 150,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "void_walker_1",
+    name: "Void Step",
+    description: "Walking through the void itself doubles the output of your void walkers.",
+    target: "adventurer",
+    adventurerId: "void_walker",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 300,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "celestial_guard_1",
+    name: "Divine Ward",
+    description: "A blessing from the celestials themselves doubles guard output.",
+    target: "adventurer",
+    adventurerId: "celestial_guard",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 750,
+    costCrystals: 0,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "divine_champion_1",
+    name: "Champion's Oath",
+    description: "An unbreakable oath to the divine doubles champion output.",
+    target: "adventurer",
+    adventurerId: "divine_champion",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 2_000,
+    costCrystals: 0,
     purchased: false,
     unlocked: false,
   },

apps/api/src/data/zones.ts

@@ -19,6 +19,15 @@ export const DEFAULT_ZONES: Zone[] = [
     status: "locked",
     unlockBossId: "lich_queen",
   },
+  {
+    id: "shadow_marshes",
+    name: "The Shadow Marshes",
+    description:
+      "A vast, fog-choked wetland where the sun never fully rises. Dark magic seeps from the earth itself, and things far older than the kingdom lurk beneath the murky waters.",
+    emoji: "🌑",
+    status: "locked",
+    unlockBossId: "troll_king",
+  },
   {
     id: "frozen_peaks",
     name: "The Frozen Peaks",
@@ -28,4 +37,22 @@ export const DEFAULT_ZONES: Zone[] = [
     status: "locked",
     unlockBossId: "elder_dragon",
   },
+  {
+    id: "volcanic_depths",
+    name: "The Volcanic Depths",
+    description:
+      "A chain of active volcanoes whose caverns plunge deep into the earth's molten heart. Legendary forges burn here, tended by fire elementals who serve no master — yet.",
+    emoji: "🌋",
+    status: "locked",
+    unlockBossId: "bone_colossus",
+  },
+  {
+    id: "astral_void",
+    name: "The Astral Void",
+    description:
+      "Beyond the veil of the mortal world lies a realm of pure possibility and absolute terror. Stars are born and die here in moments, and the beings that call this place home have never known mortality.",
+    emoji: "🌌",
+    status: "locked",
+    unlockBossId: "void_titan",
+  },
 ];

apps/api/src/routes/boss.ts

@@ -146,16 +146,24 @@ bossRouter.post("/challenge", async (context) => {
       }
     }
 
-    const bossIndex = state.bosses.findIndex((b) => b.id === body.bossId);
+    // Unlock next boss in the same zone (zone-based sequential progression)
-    const nextBoss = state.bosses[bossIndex + 1];
+    const zoneBosses = state.bosses.filter((b) => b.zoneId === boss.zoneId);
-    if (nextBoss && nextBoss.prestigeRequirement <= state.prestige.count) {
+    const zoneIndex = zoneBosses.findIndex((b) => b.id === body.bossId);
-      nextBoss.status = "available";
+    const nextZoneBoss = zoneBosses[zoneIndex + 1];
+    if (nextZoneBoss && nextZoneBoss.prestigeRequirement <= state.prestige.count) {
+      const nextBossInState = state.bosses.find((b) => b.id === nextZoneBoss.id);
+      if (nextBossInState) nextBossInState.status = "available";
     }
 
-    // Unlock any zone whose unlock condition is this boss
+    // Unlock any zone whose unlock condition is this boss, and activate its first boss
     for (const zone of (state.zones ?? [])) {
       if (zone.unlockBossId === body.bossId) {
         zone.status = "unlocked";
+        const newZoneBosses = state.bosses.filter((b) => b.zoneId === zone.id);
+        const firstNewBoss = newZoneBosses[0];
+        if (firstNewBoss && firstNewBoss.prestigeRequirement <= state.prestige.count) {
+          firstNewBoss.status = "available";
+        }
       }
     }
 

apps/api/src/routes/game.ts

@@ -69,7 +69,7 @@ gameRouter.get("/load", async (context) => {
     }
   }
 
-  // Backfill new quests and upgrades from defaults (add missing ones)
+  // Backfill new quests, upgrades, zones, and bosses from defaults (add missing ones)
   const { DEFAULT_QUESTS } = await import("../data/quests.js");
   const { DEFAULT_UPGRADES } = await import("../data/upgrades.js");
   const { DEFAULT_ZONES } = await import("../data/zones.js");
@@ -82,10 +82,14 @@ gameRouter.get("/load", async (context) => {
     }
   }
 
-  // Backfill zoneId on quests that predate the field
+  // Sync zoneId on quests to match current defaults
   for (const quest of state.quests) {
+    const defaults = DEFAULT_QUESTS.find((d) => d.id === quest.id);
+    if (defaults && quest.zoneId !== defaults.zoneId) {
+      quest.zoneId = defaults.zoneId;
+      needsBackfill = true;
+    }
     if (!quest.zoneId) {
-      const defaults = DEFAULT_QUESTS.find((d) => d.id === quest.id);
       quest.zoneId = defaults?.zoneId ?? "verdant_vale";
       needsBackfill = true;
     }
@@ -98,7 +102,23 @@ gameRouter.get("/load", async (context) => {
     }
   }
 
-  // Backfill zones on saves that predate the feature
+  // Backfill costCrystals on upgrades that predate the field
+  for (const upgrade of state.upgrades) {
+    if (upgrade.costCrystals == null) {
+      upgrade.costCrystals = 0;
+      needsBackfill = true;
+    }
+  }
+
+  // Merge new adventurers from defaults
+  for (const defaultAdventurer of DEFAULT_ADVENTURERS) {
+    if (!state.adventurers.some((a) => a.id === defaultAdventurer.id)) {
+      state.adventurers.push(structuredClone(defaultAdventurer));
+      needsBackfill = true;
+    }
+  }
+
+  // Backfill zones
   if (!Array.isArray(state.zones) || state.zones.length === 0) {
     state.zones = structuredClone(DEFAULT_ZONES);
     // Infer unlock state from defeated bosses
@@ -111,6 +131,22 @@ gameRouter.get("/load", async (context) => {
       }
     }
     needsBackfill = true;
+  } else {
+    // Merge new zones from defaults
+    for (const defaultZone of DEFAULT_ZONES) {
+      if (!state.zones.some((z) => z.id === defaultZone.id)) {
+        const newZone = structuredClone(defaultZone);
+        // Infer unlock state from defeated bosses
+        if (newZone.unlockBossId != null) {
+          const unlockBoss = state.bosses.find((b) => b.id === newZone.unlockBossId);
+          if (unlockBoss?.status === "defeated") {
+            newZone.status = "unlocked";
+          }
+        }
+        state.zones.push(newZone);
+        needsBackfill = true;
+      }
+    }
   }
 
   // Backfill zoneId on bosses that predate the field
@@ -122,6 +158,23 @@ gameRouter.get("/load", async (context) => {
     }
   }
 
+  // Merge new bosses from defaults (new zones' bosses)
+  for (const defaultBoss of DEFAULT_BOSSES) {
+    if (!state.bosses.some((b) => b.id === defaultBoss.id)) {
+      const newBoss = structuredClone(defaultBoss);
+      // If the zone for this boss is already unlocked, make the first boss in that zone available
+      const zone = state.zones.find((z) => z.id === newBoss.zoneId);
+      if (zone?.status === "unlocked") {
+        const zoneBossesInState = state.bosses.filter((b) => b.zoneId === newBoss.zoneId);
+        if (zoneBossesInState.length === 0 && newBoss.status === "locked") {
+          newBoss.status = "available";
+        }
+      }
+      state.bosses.push(newBoss);
+      needsBackfill = true;
+    }
+  }
+
   const now = Date.now();
 
   const { offlineGold, offlineSeconds } = calculateOfflineGold(state, now);

apps/web/src/components/game/EquipmentPanel.tsx

@@ -32,10 +32,25 @@ const bonusDescription = (item: Equipment): string => {
 
 interface EquipmentCardProps {
   item: Equipment;
+  gold: number;
+  essence: number;
+  crystals: number;
 }
 
-const EquipmentCard = ({ item }: EquipmentCardProps): React.JSX.Element => {
+const costLabel = (cost: { gold: number; essence: number; crystals: number }): string => {
-  const { equipItem } = useGame();
+  const parts: string[] = [];
+  if (cost.gold > 0) parts.push(`🪙 ${cost.gold.toLocaleString()}`);
+  if (cost.essence > 0) parts.push(`✨ ${cost.essence.toLocaleString()}`);
+  if (cost.crystals > 0) parts.push(`💎 ${cost.crystals.toLocaleString()}`);
+  return parts.join("  ");
+};
+
+const EquipmentCard = ({ item, gold, essence, crystals }: EquipmentCardProps): React.JSX.Element => {
+  const { equipItem, buyEquipment } = useGame();
+
+  const canAfford = item.cost
+    ? gold >= item.cost.gold && essence >= item.cost.essence && crystals >= item.cost.crystals
+    : false;
 
   return (
     <div className={`equipment-card rarity-${item.rarity} ${item.equipped ? "equipped" : ""} ${!item.owned ? "not-owned" : ""}`}>
@@ -47,9 +62,22 @@ const EquipmentCard = ({ item }: EquipmentCardProps): React.JSX.Element => {
         </div>
         <p className="equipment-description">{item.description}</p>
         <p className="equipment-bonus">{bonusDescription(item)}</p>
+        {!item.owned && item.cost && (
+          <p className="equipment-cost">{costLabel(item.cost)}</p>
+        )}
       </div>
       <div className="equipment-action">
-        {!item.owned && <span className="equipment-locked">🔒 Not yet obtained</span>}
+        {!item.owned && !item.cost && <span className="equipment-locked">🔒 Boss drop</span>}
+        {!item.owned && item.cost && (
+          <button
+            className="equip-button"
+            disabled={!canAfford}
+            onClick={() => { buyEquipment(item.id); }}
+            type="button"
+          >
+            {canAfford ? "Purchase" : "Can't afford"}
+          </button>
+        )}
         {item.owned && item.equipped && <span className="equipment-equipped-badge">✓ Equipped</span>}
         {item.owned && !item.equipped && (
           <button
@@ -104,7 +132,13 @@ export const EquipmentPanel = (): React.JSX.Element => {
             <h3 className="slot-heading">{SLOT_LABEL[slotType]}</h3>
             <div className="equipment-list">
               {items.map((item) => (
-                <EquipmentCard key={item.id} item={item} />
+                <EquipmentCard
+                  key={item.id}
+                  item={item}
+                  gold={state.resources.gold}
+                  essence={state.resources.essence}
+                  crystals={state.resources.crystals}
+                />
               ))}
               {items.length === 0 && (
                 <p className="empty-zone">No items to show in this slot.</p>

apps/web/src/components/game/UpgradePanel.tsx

@@ -7,12 +7,15 @@ interface UpgradeCardProps {
   upgrade: Upgrade;
   currentGold: number;
   currentEssence: number;
+  currentCrystals: number;
 }
 
-const UpgradeCard = ({ upgrade, currentGold, currentEssence }: UpgradeCardProps): React.JSX.Element => {
+const UpgradeCard = ({ upgrade, currentGold, currentEssence, currentCrystals }: UpgradeCardProps): React.JSX.Element => {
   const { buyUpgrade } = useGame();
   const canAfford =
-    currentGold >= upgrade.costGold && currentEssence >= upgrade.costEssence;
+    currentGold >= upgrade.costGold &&
+    currentEssence >= upgrade.costEssence &&
+    currentCrystals >= (upgrade.costCrystals ?? 0);
 
   if (!upgrade.unlocked) {
     return (
@@ -25,6 +28,7 @@ const UpgradeCard = ({ upgrade, currentGold, currentEssence }: UpgradeCardProps)
         <div className="upgrade-cost">
           {upgrade.costGold > 0 && <span>🪙 {upgrade.costGold.toLocaleString()}</span>}
           {upgrade.costEssence > 0 && <span>✨ {upgrade.costEssence.toLocaleString()}</span>}
+          {(upgrade.costCrystals ?? 0) > 0 && <span>💎 {upgrade.costCrystals?.toLocaleString()}</span>}
         </div>
         <span className="upgrade-locked-label">Locked</span>
       </div>
@@ -50,6 +54,7 @@ const UpgradeCard = ({ upgrade, currentGold, currentEssence }: UpgradeCardProps)
       <div className="upgrade-cost">
         {upgrade.costGold > 0 && <span>🪙 {upgrade.costGold.toLocaleString()}</span>}
         {upgrade.costEssence > 0 && <span>✨ {upgrade.costEssence.toLocaleString()}</span>}
+        {(upgrade.costCrystals ?? 0) > 0 && <span>💎 {upgrade.costCrystals?.toLocaleString()}</span>}
       </div>
       <button
         className="buy-button"
@@ -94,6 +99,7 @@ export const UpgradePanel = (): React.JSX.Element => {
               upgrade={upgrade}
               currentGold={state.resources.gold}
               currentEssence={state.resources.essence}
+              currentCrystals={state.resources.crystals}
             />
           ))}
           {purchased.map((upgrade) => (
@@ -102,6 +108,7 @@ export const UpgradePanel = (): React.JSX.Element => {
               upgrade={upgrade}
               currentGold={state.resources.gold}
               currentEssence={state.resources.essence}
+              currentCrystals={state.resources.crystals}
             />
           ))}
           {showLocked && locked.map((upgrade) => (
@@ -110,6 +117,7 @@ export const UpgradePanel = (): React.JSX.Element => {
               upgrade={upgrade}
               currentGold={state.resources.gold}
               currentEssence={state.resources.essence}
+              currentCrystals={state.resources.crystals}
             />
           ))}
         </div>

apps/web/src/context/GameContext.tsx

@@ -25,6 +25,8 @@ interface GameContextValue {
   buyAdventurer: (adventurerId: string) => void;
   /** Buy an upgrade */
   buyUpgrade: (upgradeId: string) => void;
+  /** Purchase a buyable equipment item */
+  buyEquipment: (equipmentId: string) => void;
   /** Start a quest */
   startQuest: (questId: string) => void;
   /** Challenge a boss — runs full server-side simulation */
@@ -175,6 +177,7 @@ export const GameProvider = ({ children }: { children: React.ReactNode }): React
       if (!upgrade || !upgrade.unlocked || upgrade.purchased) return prev;
       if (prev.resources.gold < upgrade.costGold) return prev;
       if (prev.resources.essence < upgrade.costEssence) return prev;
+      if (prev.resources.crystals < (upgrade.costCrystals ?? 0)) return prev;
 
       return {
         ...prev,
@@ -182,6 +185,7 @@ export const GameProvider = ({ children }: { children: React.ReactNode }): React
           ...prev.resources,
           gold: prev.resources.gold - upgrade.costGold,
           essence: prev.resources.essence - upgrade.costEssence,
+          crystals: prev.resources.crystals - (upgrade.costCrystals ?? 0),
         },
         upgrades: prev.upgrades.map((u) =>
           u.id === upgradeId ? { ...u, purchased: true } : u,
@@ -225,6 +229,37 @@ export const GameProvider = ({ children }: { children: React.ReactNode }): React
     });
   }, []);
 
+  const buyEquipment = useCallback((equipmentId: string) => {
+    setState((prev) => {
+      if (!prev) return prev;
+      const item = (prev.equipment ?? []).find((e) => e.id === equipmentId);
+      if (!item || item.owned || !item.cost) return prev;
+
+      const { gold, essence, crystals } = item.cost;
+      if (prev.resources.gold < gold) return prev;
+      if (prev.resources.essence < essence) return prev;
+      if (prev.resources.crystals < crystals) return prev;
+
+      const slotAlreadyEquipped = (prev.equipment ?? []).some(
+        (e) => e.type === item.type && e.equipped,
+      );
+
+      return {
+        ...prev,
+        resources: {
+          ...prev.resources,
+          gold: prev.resources.gold - gold,
+          essence: prev.resources.essence - essence,
+          crystals: prev.resources.crystals - crystals,
+        },
+        equipment: (prev.equipment ?? []).map((e) => {
+          if (e.id === equipmentId) return { ...e, owned: true, equipped: !slotAlreadyEquipped };
+          return e;
+        }),
+      };
+    });
+  }, []);
+
   const challengeBoss = useCallback(async (bossId: string) => {
     if (!stateRef.current) return;
     const boss = stateRef.current.bosses.find((b) => b.id === bossId);
@@ -238,21 +273,33 @@ export const GameProvider = ({ children }: { children: React.ReactNode }): React
         if (!prev) return prev;
 
         if (result.won) {
-          const bossIndex = prev.bosses.findIndex((b) => b.id === bossId);
+          const defeatedBoss = prev.bosses.find((b) => b.id === bossId);
+          const zoneBosses = prev.bosses.filter((b) => b.zoneId === defeatedBoss?.zoneId);
+          const zoneIdx = zoneBosses.findIndex((b) => b.id === bossId);
+          const nextZoneBossId = zoneBosses[zoneIdx + 1]?.id;
+
+          // Find newly unlocked zones and their first bosses
+          const newlyUnlockedZones = (prev.zones ?? []).filter((z) => z.unlockBossId === bossId && z.status === "locked");
+          const newZoneFirstBossIds = newlyUnlockedZones.map((z) => {
+            const firstBoss = prev.bosses.find((b) => b.zoneId === z.id);
+            return firstBoss?.id;
+          }).filter(Boolean);
+
           return {
             ...prev,
-            bosses: prev.bosses.map((b, idx) => {
+            bosses: prev.bosses.map((b) => {
-              if (b.id === bossId) {
+              if (b.id === bossId) return { ...b, status: "defeated" as const, currentHp: 0 };
-                return { ...b, status: "defeated" as const, currentHp: 0 };
+              if (b.id === nextZoneBossId && b.prestigeRequirement <= prev.prestige.count) {
+                return { ...b, status: "available" as const };
               }
-              if (
+              if (newZoneFirstBossIds.includes(b.id) && b.prestigeRequirement <= prev.prestige.count) {
-                idx === bossIndex + 1 &&
-                b.prestigeRequirement <= prev.prestige.count
-              ) {
                 return { ...b, status: "available" as const };
               }
               return b;
             }),
+            zones: (prev.zones ?? []).map((z) =>
+              z.unlockBossId === bossId ? { ...z, status: "unlocked" as const } : z,
+            ),
             resources: result.rewards
               ? {
                   ...prev.resources,
@@ -332,6 +379,7 @@ export const GameProvider = ({ children }: { children: React.ReactNode }): React
         handleClick,
         buyAdventurer,
         buyUpgrade,
+        buyEquipment,
         startQuest,
         challengeBoss,
         equipItem,

apps/web/src/styles.css

@@ -937,6 +937,12 @@ body {
   font-size: 0.8rem;
 }
 
+.equipment-cost {
+  color: var(--colour-essence);
+  font-size: 0.8rem;
+  margin-top: 0.2rem;
+}
+
 .equipment-equipped-badge {
   color: var(--colour-success);
   font-size: 0.85rem;

packages/types/src/interfaces/Equipment.ts

@@ -22,4 +22,6 @@ export interface Equipment {
   owned: boolean;
   /** Whether this item is currently equipped (only one per type can be equipped) */
   equipped: boolean;
+  /** If set, this item can be purchased directly rather than obtained via boss drops */
+  cost?: { gold: number; essence: number; crystals: number };
 }

packages/types/src/interfaces/Upgrade.ts

@@ -16,6 +16,7 @@ export interface Upgrade {
   multiplier: number;
   costGold: number;
   costEssence: number;
+  costCrystals: number;
   purchased: boolean;
   unlocked: boolean;
 }