This research will only appear after you have built the Spectral Ruins.
Increases the amount of souls recovered per battle for defending troops.
| Level | Rate | Times | Cost | Requires |
| 1 | 5-12% | 3h0m | None | |
| 2 | 5-15% | 5h0m | 400 Stone; 800 Metals; 400 Food; 800 Lumber; 20,000 Gold | None |
| 3 | 5-20% | 8h0m | 800 Food; 1600 Lumber; 800 Stone; 1600 Metals; 40,000 Gold | None |
| 4 | 10-20% | 12h0m | None | |
| 5 | 10-25% | 17h0m | 3200 Food; 6400 Lumber; 3200 Stone; 6400 Metals; 160,000 Gold | None |
| 6 | 15-25% | 23h 0m | 6400 Food; 12800 Lumber; 6400 Stone; 12800 Metals; 320,000 Gold | None |
| 7 | 15-30% | 1d5h0m | None | |
| 8 | 20-35% | 2d0h0m | 51200 Food; 102400 Lumber; 51200 Stone; 102400 Metal; 2,560,000 Gold | None |
| 9 | 25-40% | 2d8h0m | None | |
| 10 | 30-50% | 4d0h0m |
102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold; |
None |
| 11 | 30-60% | 4d 0h 0m | 102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold; | SC 13 |
| 12 | 40-70% | 4d 0h 0m | 102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold; | SC 15 |
| 13 | 40-70% | 7d 0h 0m | 102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold; | SC 15 |
| 14 | 80--95% | 7d 0h 0m | 102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold; |
SC 15 |
| 15 | 7d 0h 0m | 102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold |
SC 16 | |
| 16 | 7d 0h 0m | 102,400 Food; 204,800 Lumber; 102,400 Stone; 204,800 Metals; 5,120,000 Gold |
SC 16 |
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| Page last updated: 2024-04-19 06:25 (UTC) |
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