RESEARCH · MAX LEVEL 10
Iron Defense I
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 | 23,300,700 | 23,300,700 | 69,902,200 | 765,420 | Scholar Tower I Lv. 30 | Drill Ground Capacity I · Level 1; Rescue Capacity I · Level 1 |
| 2 | 23,300,700 | 23,300,700 | 69,902,200 | 765,420 | Scholar Tower I Lv. 30 | |
| 3 | 25,630,800 | 25,630,800 | 76,892,500 | 918,480 | Scholar Tower I Lv. 30 | |
| 4 | 25,630,800 | 25,630,800 | 76,892,500 | 918,480 | Scholar Tower I Lv. 30 | |
| 5 | 28,193,900 | 28,193,900 | 84,581,700 | 1,102,200 | Scholar Tower I Lv. 30 | |
| 6 | 28,193,900 | 28,193,900 | 84,581,700 | 1,102,200 | Scholar Tower I Lv. 30 | |
| 7 | 31,013,300 | 31,013,300 | 93,039,900 | 1,322,640 | Scholar Tower I Lv. 30 | |
| 8 | 31,013,300 | 31,013,300 | 93,039,900 | 1,322,640 | Scholar Tower I Lv. 30 | |
| 9 | 34,114,600 | 34,114,600 | 102,343,900 | 1,454,880 | Scholar Tower I Lv. 30 | |
| 10 | 34,114,600 | 34,114,600 | 102,343,900 | 1,454,880 | Scholar Tower I Lv. 30 |