Castle Keep — Level 4
Unit cap 16 · +3 resource regen · 460 gold to reach.
| Unit cap | 16 |
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| Resource regen bonus | +3 |
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| Cumulative upgrade cost | 460 gold |
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Buildings unlocked at this level
- Forge — Crafts hero items from gold and essence.
- Hero Hall — Recruit and equip heroes who fight beside your army.
- Temple of Light — Trains the Paladin. Each level blesses all units with +2% HP.
- War Academy — Drills your active hero while you're away: idle hero XP per hour.
- Mage Tower — Joins the battle: arcane orbs splash magic damage that ignores armor.
- Alchemy Lab — Transmutes resources: generates Essence passively over time (idle income like a Gold Mine).
← Level 3 · Level 5 →