feat: add equipment set bonuses and boss bounty runestones

- Define EquipmentSet type + computeSetBonuses utility in packages/types
- Add setId field to Equipment type and assign sets to 27 equipment items
- Create 9 named equipment sets (Iron Vanguard → Eternal Throne) with 2pc/3pc bonuses
- Apply set combat multiplier in boss route
- Apply set gold/click multipliers in tick engine and click handler
- Include set bonuses in anti-cheat delta validation
- Show active set bonus strip + set badge per card in EquipmentPanel
- Add boss first-kill bounty runestones (scaling 1–10 per boss tier)
- Update AboutPanel and IDEAS.md

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

@@ -28,8 +28,8 @@ const HOW_TO_PLAY = [
     body: "New zones unlock when you defeat the final boss AND complete the final quest of the previous zone. Each zone contains new bosses and quests with progressively greater rewards.",
   },
   {
-    title: "🗡️ Equipment",
-    body: "Earn equipment from boss drops and quest rewards. Each piece of equipment provides bonuses to gold income, click power, or adventurer output. Rarer equipment provides stronger bonuses.",
+    title: "🗡️ Equipment & Sets",
+    body: "Earn equipment from boss drops and quest rewards. Each piece provides bonuses to gold income, click power, or combat. Rarer equipment provides stronger bonuses. Equip matching set pieces (2 or 3 of a named set) to unlock escalating set bonuses shown at the top of the Equipment panel.",
   },
   {
     title: "⭐ Prestige",

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

@@ -133,6 +133,9 @@ export const BattleModal = ({
                     {result.rewards.crystals > 0 && (
                       <span>💎 {formatNumber(result.rewards.crystals)} crystals</span>
                     )}
+                    {result.rewards.bountyRunestones > 0 && (
+                      <span className="battle-bounty">🔮 {formatNumber(result.rewards.bountyRunestones)} runestones (first kill!)</span>
+                    )}
                   </div>
                 )}
               </>

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

@@ -70,6 +70,9 @@ const BossCard = ({
         {(boss.equipmentRewards ?? []).length > 0 && (
           <span>🗡️ {boss.equipmentRewards.length} Equipment</span>
         )}
+        {boss.status !== "defeated" && boss.bountyRunestones > 0 && (
+          <span className="boss-bounty">🔮 {boss.bountyRunestones} (first kill)</span>
+        )}
       </div>
 
       {(boss.status === "available" || boss.status === "in_progress") && (

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

@@ -1,6 +1,7 @@
 import type { Equipment, EquipmentType } from "@elysium/types";
 import { useState } from "react";
 import { useGame } from "../../context/GameContext.js";
+import { EQUIPMENT_SETS } from "../../data/equipmentSets.js";
 import { LockToggle } from "../ui/LockToggle.js";
 
 const RARITY_LABEL: Record<string, string> = {
@@ -36,6 +37,7 @@ interface EquipmentCardProps {
   essence: number;
   crystals: number;
   dropBossName?: string | undefined;
+  setName?: string | undefined;
 }
 
 const costLabel = (cost: { gold: number; essence: number; crystals: number }): string => {
@@ -46,7 +48,7 @@ const costLabel = (cost: { gold: number; essence: number; crystals: number }): s
   return parts.join("  ");
 };
 
-const EquipmentCard = ({ item, gold, essence, crystals, dropBossName }: EquipmentCardProps): React.JSX.Element => {
+const EquipmentCard = ({ item, gold, essence, crystals, dropBossName, setName }: EquipmentCardProps): React.JSX.Element => {
   const { equipItem, buyEquipment } = useGame();
 
   const canAfford = item.cost
@@ -63,6 +65,7 @@ const EquipmentCard = ({ item, gold, essence, crystals, dropBossName }: Equipmen
         </div>
         <p className="equipment-description">{item.description}</p>
         <p className="equipment-bonus">{bonusDescription(item)}</p>
+        {setName && <span className="equipment-set-badge">🔗 {setName}</span>}
         {!item.owned && item.cost && (
           <p className="equipment-cost">{costLabel(item.cost)}</p>
         )}
@@ -121,6 +124,31 @@ export const EquipmentPanel = (): React.JSX.Element => {
     }
   }
 
+  // Build set name lookup for card badges
+  const setNameById = new Map<string, string>(
+    EQUIPMENT_SETS.map((s) => [s.id, s.name]),
+  );
+
+  // Compute active set bonuses for the summary strip
+  const equippedItemIds = equipment.filter((e) => e.equipped).map((e) => e.id);
+  const activeSets = EQUIPMENT_SETS.map((set) => {
+    const count = set.pieces.filter((id) => equippedItemIds.includes(id)).length;
+    return { set, count };
+  }).filter(({ count }) => count >= 2);
+
+  const setBonusDescription = (set: typeof EQUIPMENT_SETS[number], count: number): string => {
+    const parts: string[] = [];
+    for (const threshold of [2, 3] as const) {
+      if (count >= threshold) {
+        const bonus = set.bonuses[threshold];
+        if (bonus.goldMultiplier) parts.push(`+${Math.round((bonus.goldMultiplier - 1) * 100)}% Gold/s (${threshold}pc)`);
+        if (bonus.combatMultiplier) parts.push(`+${Math.round((bonus.combatMultiplier - 1) * 100)}% Combat (${threshold}pc)`);
+        if (bonus.clickMultiplier) parts.push(`+${Math.round((bonus.clickMultiplier - 1) * 100)}% Click (${threshold}pc)`);
+      }
+    }
+    return parts.join(", ");
+  };
+
   return (
     <section className="panel equipment-panel">
       <div className="panel-header">
@@ -132,9 +160,21 @@ export const EquipmentPanel = (): React.JSX.Element => {
         />
       </div>
       <p className="equipment-intro">
-        Equipment drops from bosses and grants passive bonuses. Only one item per slot can be equipped at a time.
+        Equipment drops from bosses and grants passive bonuses. Only one item per slot can be equipped at a time. Equip matching set pieces for bonus effects!
       </p>
 
+      {activeSets.length > 0 && (
+        <div className="active-sets">
+          <h3 className="active-sets-heading">✨ Active Set Bonuses</h3>
+          {activeSets.map(({ set, count }) => (
+            <div key={set.id} className="active-set-row">
+              <span className="active-set-name">{set.name} ({count}/{set.pieces.length})</span>
+              <span className="active-set-bonus">{setBonusDescription(set, count)}</span>
+            </div>
+          ))}
+        </div>
+      )}
+
       {SLOT_ORDER.map((slotType) => {
         const items = equipment.filter(
           (e) => e.type === slotType && (showLocked || e.owned),
@@ -151,6 +191,7 @@ export const EquipmentPanel = (): React.JSX.Element => {
                   essence={state.resources.essence}
                   crystals={state.resources.crystals}
                   dropBossName={equipmentDropSources.get(item.id)}
+                  setName={item.setId ? setNameById.get(item.setId) : undefined}
                 />
               ))}
               {items.length === 0 && (

apps/web/src/data/equipmentSets.ts

@@ -0,0 +1,94 @@
+import type { EquipmentSet } from "@elysium/types";
+
+export const EQUIPMENT_SETS: EquipmentSet[] = [
+  {
+    id: "iron_vanguard",
+    name: "Iron Vanguard",
+    description: "The armaments of a seasoned guild soldier — proven steel, reliable gold.",
+    pieces: ["iron_sword", "chainmail", "mages_focus"],
+    bonuses: {
+      2: { goldMultiplier: 1.1 },
+      3: { combatMultiplier: 1.1 },
+    },
+  },
+  {
+    id: "shadow_infiltrator",
+    name: "Shadow Infiltrator",
+    description: "Gear forged from the Shadow Marshes themselves — unseen, unstoppable.",
+    pieces: ["shadow_dagger", "void_shroud", "void_compass"],
+    bonuses: {
+      2: { goldMultiplier: 1.15 },
+      3: { clickMultiplier: 1.2 },
+    },
+  },
+  {
+    id: "volcanic_forger",
+    name: "Volcanic Forger",
+    description: "Weapons and armour tempered in the depths of the Volcanic Reaches.",
+    pieces: ["flame_lance", "volcanic_plate", "crystal_shard"],
+    bonuses: {
+      2: { combatMultiplier: 1.15 },
+      3: { goldMultiplier: 1.15 },
+    },
+  },
+  {
+    id: "celestial_guardian",
+    name: "Celestial Guardian",
+    description: "Relics of the Celestial Reaches — divine power made manifest.",
+    pieces: ["seraph_wing", "celestial_armour", "angels_halo"],
+    bonuses: {
+      2: { combatMultiplier: 1.2 },
+      3: { goldMultiplier: 1.2 },
+    },
+  },
+  {
+    id: "abyssal_predator",
+    name: "Abyssal Predator",
+    description: "Trophies reclaimed from the deepest trenches of the Abyssal Reaches.",
+    pieces: ["depth_blade", "pressure_plate", "leviathan_eye"],
+    bonuses: {
+      2: { goldMultiplier: 1.2 },
+      3: { clickMultiplier: 1.25 },
+    },
+  },
+  {
+    id: "infernal_conqueror",
+    name: "Infernal Conqueror",
+    description: "Forged in the heart of the Infernal Court from the essence of the defeated.",
+    pieces: ["hellfire_edge", "demon_hide", "soul_gem"],
+    bonuses: {
+      2: { combatMultiplier: 1.25 },
+      3: { goldMultiplier: 1.25 },
+    },
+  },
+  {
+    id: "crystal_domain",
+    name: "Crystal Domain",
+    description: "Instruments of the Crystalline Spire — reality refracted into absolute efficiency.",
+    pieces: ["prism_blade", "faceted_armour", "prism_eye"],
+    bonuses: {
+      2: { clickMultiplier: 1.25 },
+      3: { goldMultiplier: 1.25 },
+    },
+  },
+  {
+    id: "void_emperor",
+    name: "Void Emperor",
+    description: "The regalia of the Void Sanctum's lord — power carved from absolute nothingness.",
+    pieces: ["void_annihilator", "eternal_shroud", "void_heart_gem"],
+    bonuses: {
+      2: { goldMultiplier: 1.3 },
+      3: { combatMultiplier: 1.3 },
+    },
+  },
+  {
+    id: "eternal_throne",
+    name: "Eternal Throne",
+    description: "The armaments of the Eternal Throne — weapons and armour that have endured all of time.",
+    pieces: ["throne_blade", "eternal_armour", "eternity_stone"],
+    bonuses: {
+      2: { combatMultiplier: 1.35, goldMultiplier: 1.25 },
+      3: { clickMultiplier: 1.35 },
+    },
+  },
+];

apps/web/src/engine/tick.ts

@@ -1,4 +1,6 @@
 import type { Achievement, Equipment, GameState } from "@elysium/types";
+import { computeSetBonuses } from "@elysium/types";
+import { EQUIPMENT_SETS } from "../data/equipmentSets.js";
 import { updateChallengeProgress } from "../utils/dailyChallenges.js";
 
 /**
@@ -57,6 +59,7 @@ export const applyTick = (state: GameState, deltaSeconds: number): GameState =>
     (mult, e) => mult * (e.bonus.goldMultiplier ?? 1),
     1,
   );
+  const setGoldMultiplier = computeSetBonuses(equippedItems.map((e) => e.id), EQUIPMENT_SETS).goldMultiplier;
 
   const runestonesIncome = state.prestige.runestonesIncomeMultiplier ?? 1;
   const runestonesEssence = state.prestige.runestonesEssenceMultiplier ?? 1;
@@ -88,6 +91,7 @@ export const applyTick = (state: GameState, deltaSeconds: number): GameState =>
       prestige *
       runestonesIncome *
       equipmentGoldMultiplier *
+      setGoldMultiplier *
       deltaSeconds;
 
     essenceGained +=
@@ -228,7 +232,7 @@ export const applyTick = (state: GameState, deltaSeconds: number): GameState =>
       essence: newEssence,
       crystals: capResource(state.resources.crystals + questCrystals + challengeCrystals),
     },
-    dailyChallenges: updatedDailyChallenges,
+    ...(updatedDailyChallenges !== undefined ? { dailyChallenges: updatedDailyChallenges } : {}),
     player: {
       ...state.player,
       totalGoldEarned: newTotalGoldEarned,
@@ -271,9 +275,11 @@ export const calculateClickPower = (state: GameState): number => {
     .filter((u) => u.purchased && u.target === "click")
     .reduce((mult, upgrade) => mult * upgrade.multiplier, 1);
 
-  const equipmentClickMultiplier = (state.equipment ?? [])
-    .filter((e) => e.equipped && e.bonus.clickMultiplier != null)
+  const equippedItems = (state.equipment ?? []).filter((e) => e.equipped);
+  const equipmentClickMultiplier = equippedItems
+    .filter((e) => e.bonus.clickMultiplier != null)
     .reduce((mult, e) => mult * (e.bonus.clickMultiplier ?? 1), 1);
+  const setClickMultiplier = computeSetBonuses(equippedItems.map((e) => e.id), EQUIPMENT_SETS).clickMultiplier;
 
   const runestonesClick = state.prestige.runestonesClickMultiplier ?? 1;
 
@@ -282,6 +288,7 @@ export const calculateClickPower = (state: GameState): number => {
     clickMultiplier *
     state.prestige.productionMultiplier *
     runestonesClick *
-    equipmentClickMultiplier
+    equipmentClickMultiplier *
+    setClickMultiplier
   );
 };

apps/web/src/styles.css

@@ -498,6 +498,11 @@ body {
   font-size: 0.9rem;
 }
 
+.boss-bounty {
+  color: #a78bfa;
+  font-weight: bold;
+}
+
 .attack-button {
   align-self: flex-start;
   background: linear-gradient(135deg, #ef4444, #b91c1c);
@@ -862,6 +867,11 @@ body {
   margin: 0.5rem 0;
 }
 
+.battle-bounty {
+  color: #a78bfa;
+  font-weight: bold;
+}
+
 .dismiss-button {
   background: var(--colour-accent);
   border: none;
@@ -945,6 +955,46 @@ body {
   margin-bottom: 1.25rem;
 }
 
+.active-sets {
+  background: rgba(138, 43, 226, 0.08);
+  border: 1px solid rgba(138, 43, 226, 0.3);
+  border-radius: 8px;
+  padding: 0.75rem 1rem;
+  margin-bottom: 1.25rem;
+}
+
+.active-sets-heading {
+  font-size: 0.9rem;
+  font-weight: 600;
+  color: #bf7fff;
+  margin: 0 0 0.5rem;
+}
+
+.active-set-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.4rem 1rem;
+  align-items: baseline;
+  font-size: 0.82rem;
+  margin-bottom: 0.25rem;
+}
+
+.active-set-name {
+  font-weight: 600;
+  color: #d4a0ff;
+}
+
+.active-set-bonus {
+  color: var(--colour-text-muted);
+}
+
+.equipment-set-badge {
+  display: inline-block;
+  font-size: 0.75rem;
+  color: #bf7fff;
+  margin-top: 0.2rem;
+}
+
 .equipment-slot-section {
   margin-bottom: 1.5rem;
 }