“Enhances Quarry Speed”
| Level | Requirements | Bread | Wood | Stone | Iron | Gold | Upgrade Time | Power | Bonus |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Academy Lv. 23, Iron Mining III Lv. 1 | 1,200,000 | 1,200,000 | 240,000 | 62,000 | 16,000 | 11:06:40 | 2,080 | +8.00% Stone Output |
| 2 | Academy Lv. 24, Stone Output IV Lv. 1 | 1,700,000 | 1,700,000 | 340,000 | 86,000 | 22,000 | 16:40:00 | 2,080 | +8.00% Stone Output |
| 3 | Academy Lv. 25, Stone Output IV Lv. 2 | 3,700,000 | 3,700,000 | 740,000 | 180,000 | 48,000 | 1d 20:26:40 | 2,600 | +10.00% Stone Output |