RESEARCH · MAX LEVEL 5
Attack Boost
Compare required levels and costs before progressing.
Level costs & requirements
Each row describes the target level. Prerequisite material costs are separate.
| Target level | Wood | Food | Coins | Base time (seconds) | Required buildings | Research prerequisites |
|---|---|---|---|---|---|---|
| 1 | 0 | 0 | 4,953,400 | 17,460 | Scholar Tower I Lv. 20 | Ultimate Protection · Level 1 |
| 2 | 0 | 0 | 4,953,400 | 17,460 | Scholar Tower I Lv. 20 | |
| 3 | 0 | 0 | 6,934,700 | 22,680 | Scholar Tower I Lv. 21 | |
| 4 | 0 | 0 | 6,934,700 | 22,680 | Scholar Tower I Lv. 21 | |
| 5 | 0 | 0 | 9,708,600 | 29,460 | Scholar Tower I Lv. 22 |