Eizčerv, sometimes known as frost worms, are massive, snake-like creatures from northern regions that are presumed to be creations of the Nonmen. Their very structure seems to defy biology, and very few have ever been slain to provide corpses for examination. They can reach sixty feet in length, including their bony, spider-like head and massive pincers. The whole stretch of their body is a frosty whitish-blue, giving them natural camouflage in the artic regions the beasts lie in wait within. They have the ability to generate intense heat using a specialized organ at the crest of their head that resembles an enlarged eye. They use this to burrow through thick ice, creating tunnels which they hibernate in for decades.
Their flesh is dense and, when dissected, reveals a ring-like structure more akin to the tentacles of squid than that of any land creature, and their bones appear to be made of porous Orichalcum infiltrated with a vascular system, like the bones of dragons. They are aggressive creatures, having very little to fear, and attack on sight of anything that looks edible.