Everyone who sees Nidhoggs from a great distance feels a bone-chilling terror. Like the black dragon of legend, these deadly siege engines destroy everything in their path. Learning this Knowledge allows you to build Nidhoggs.
| Level | Gold | Soul Shard | Time | Requirements | Nidhogg Unlocked | Influence | Hero’s Experience |
| 1 | 9.4M | 4.55M | 5 303w 1d 00h 00m 00s> 101 Year(s) | Tier VIII warrior defense 2, Oracle 36 | 1% | 53M | 2.1M |
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