Treasure Trove unlocks when players complete Skirmish 8 and have reached Castle Level 17. There are only 9 levels to upgrade. The Treasure Trove is a fixed building, meaning the location is set and cannot be changed.
In the Treasure Trove players can make Gem deposits, which will gain interest and earn the player more Gems. The deposit amount is set at 10,000 Gems, and the deposit can be made for either 7, 14 or 30 days.
With Max Deposit I Research players can add 10,000 to the max deposit. This amount can be increased by 5,000, with Max Deposit II Research.
The max deposit can also be increased by 2000-10,000 Gems through the Support Skill, Capitalist, of the Familiar Hoarder. The amount depends on the skill level of the Familiar.
| Level |  Crystal Pickaxe
| Requirements |  Might Bonus
|  Food Cost
|  Stone Cost
|  Wood Cost
|  Ore Cost
| Original Time |
|---|---|---|---|---|---|---|---|---|
| 1 | 0 | Castle 17 | 0 | |||||
| 2 | 5 | Castle 18 | 375,000 | 375,000 | 375,000 | 375,000 | 5:25:00 | |
| 3 | 25 | Castle 19 | 7,875 | 562,500 | 562,500 | 562,500 | 562,500 | 10:50:00 |
| 4 | 55 | Castle 20 | 11,812 | 843,750 | 843,750 | 843,750 | 843,750 | 21:40:00 |
| 5 | 75 | Castle 21 | 17,719 | 1,262,625 | 1,262,625 | 1,262,625 | 1,262,625 | 1d 19:20:00 |
| 6 | 145 | Castle 22 | 26,578 | 1,898,437 | 1,898,437 | 1,898,437 | 1,898,437 | 3d 14:40:00 |
| 7 | 295 | Castle 23 | 39,867 | 2,847,656 | 2,847,656 | 2,847,656 | 2,847,656 | 7d 05:20:00 |
| 8 | 900 | Castle 24 | 59,801 | 4,271,484 | 4,271,484 | 4,271,484 | 4,271,484 | 14d 10:40:00 |
| 9 | 3500 | Castle 25, Gold Hammer | 89,701 | 6,407,226 | 6,407,226 | 6,407,226 | 6,407,226 | 26d 00:00:00 |
| Total | 5000 |
Investment Profits Edit
These are the profits if players have not researched any of Max Deposit I, Max Deposit II and have not obtained Hoarder Familiar, when deposit for 30 days.
| Level | Max Deposit | Interest (85% Base + Bonus) | Max Payout | Max Profit |
|---|---|---|---|---|
| 1 | 10,250 | 0% | 18,962 | 8,712 |
| 2 | 10,500 | 1% | 19,530 | 9,030 |
| 3 | 11,000 | 2% | 20,570 | 9,570 |
| 4 | 12,000 | 3% | 22,560 | 10,560 |
| 5 | 13,000 | 4% | 24,570 | 11,570 |
| 6 | 14,000 | 5% | 26,600 | 12,600 |
| 7 | 15,000 | 7% | 28,800 | 13,800 |
| 8 | 16,000 | 12% | 31,520 | 15,520 |
| 9 | 20,000 | 20% | 41,000 | 21,000 |
The maximum possible deposit is currently 45,000 Gems:
- Treasure Trove, Lv.9: 20,000 Gems
- Max Deposit I, Lv.10: 10,000 Gems
- Max Deposit II, Lv.10: 5,000 Gems
- Hoarder, Pact 4 Familiar when at Elder, level 60 and first skill "Trove Expansion" permanent effect at Lv.10 will give Max Deposit +10,000.
The best possible payout is 92,250 Gems, with a 30-day deposit of 45,000 Gems (actual profit is 47,250 Gems).
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