Níðhöggr

“Malice Striker.” A dragon or serpent coiled at the base of Yggdrasil’s root extending into Niflheimr. It gnaws endlessly at the wood, attacking the foundations of the cosmos from below.

Níðhöggr is not merely destructive. It also devours the bodies of oathbreakers and murderers at Náströnd, the Corpse Shore. It is destruction with moral dimension—the thing that tears the world apart is also the thing that punishes those who tear the social order apart.

The dragon represents entropy itself. It is the force that will eventually succeed, when Yggdrasil finally falls and Ragnarök consumes everything.