The Knowledge allows the construction of a new type of siege engines — Polyboloi. Seize the opportunity to strengthen your siege troops with these battle units!
| Level | Food | Lumber | Iron | Stone | Silver | Gold | Time | Requirements | Unlock Polyboloi | Influence | Hero’s Experience |
| 1 | 7.25M | 7.25M | 5.4M | 7.25M | 17M | 2M | 102w 6d 00h 00m 00s> 1 Year(s) | -1 | 865K | 1.2M |
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