A large horned snake with clawed forelimbs, distantly related to dragons

A Linnorm, like a wyvern, is distantly related to a dragon. A linnorm resembles a large horned snake with a pair of clawed forelimbs.

The lindworm is a wingless, serpentine, dragon-like monstrosity that dwells in deep arctic lakes and bays. It has white scales like a white dragon and a draconic head, but it only has two front legs with strong claws. It is wingless, with a back half that resembles a giant snake or serpent. It slithers through the water of across the ice and snow with surprising speed in pursuit of its prey.

Tales tell that lindworms were once a family of dwarves who offended the gods and, as punishment, were transformed into the vile monstrosities they are today. Whether or not this origin is true, lindworms are indeed fearsome creatures, striking any who enter their hunting grounds. They are known to hoard the bones and possessions of those that they have slain, as well as items found in the wrecks of vessels that have sunk in the icy waters of their homes.