A gigantic figure holding a spear, forks of flame and a bloodcurdling drumbeat — these powerful, huge machines terrify and deal irrevocable damage to enemies. Upgrading this Knowledge allows you to create a new siege troop type — Hel's Harbingers.
| Level | Food | Lumber | Iron | Stone | Silver | Gold | Totem | Time | Requirements | Unlock Hel’s Harbingers | Influence | Hero’s Experience |
| 1 | 100M | 100M | 80M | 100M | 150M | 7.9M | 500 | 411w 3d 00h 00m 00s> 7 Year(s) | -1 | 3.5M | 4.8M |
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