“Enhances Stone Gathering Speed”
| Level | Requirements | Bread | Wood | Stone | Iron | Gold | Upgrade Time | Power | Bonus |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Academy Lv. 30, Iron Output V Lv. 1 | 1,600,000 | 1,600,000 | 330,000 | 83,000 | 48,000 | 2d 00:36:40 | 2,000 | +16.00% Stone Gathering Speed |
| 2 | Stone Mining V Lv. 1 | 2,300,000 | 2,300,000 | 460,000 | 110,000 | 67,000 | 3d 00:55:00 | 2,000 | +16.00% Stone Gathering Speed |
| 3 | Stone Mining V Lv. 2 | 4,900,000 | 4,900,000 | 990,000 | 240,000 | 140,000 | 8d 02:26:40 | 2,687 | +21.50% Stone Gathering Speed |