“Enhances Iron Output at Ironworks”
| Level | Requirements | Bread | Wood | Stone | Iron | Gold | Upgrade Time | Power | Bonus |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Academy Lv. 30, Bread Output VI Lv. 1, Stone Output V Lv. 1, Wood Output VI Lv. 1 | 2,200,000 | 2,200,000 | 440,000 | 110,000 | 64,000 | 2d 21:26:40 | 2,080 | +8.00% Iron Output |
| 2 | Iron Output V Lv. 1 | 3,000,000 | 3,000,000 | 610,000 | 150,000 | 89,000 | 4d 08:10:00 | 2,080 | +8.00% Iron Output |
| 3 | Iron Output V Lv. 2 | 6,600,000 | 6,600,000 | 1,300,000 | 330,000 | 190,000 | 11d 13:46:40 | 2,600 | +10.00% Iron Output |