“Enhances Stone Gathering Speed”
| Level | Requirements | Bread | Wood | Stone | Iron | Gold | Upgrade Time | Power | Bonus |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Academy Lv. 7, Stone Output I Lv. 1 | 10,000 | 10,000 | 2,000 | 500 | 600 | 00:01:34 | 2,000 | +16.00% Stone Gathering Speed |
| 2 | Academy Lv. 8, Stone Mining I Lv. 1 | 14,000 | 14,000 | 2,800 | 700 | 840 | 00:02:21 | 2,000 | +16.00% Stone Gathering Speed |
| 3 | Academy Lv. 9, Stone Mining I Lv. 2 | 30,000 | 30,000 | 6,000 | 1,500 | 1,800 | 00:06:18 | 2,687 | +21.50% Stone Gathering Speed |