Remorhaz

Threat Level: High-Extremly High

The Remorhaz is a traditionally arctic monstrosity. A predator preying on elk, polar bears, and other creatures that wander into their territory. They burrow deep into snow or ice, lying in wait for the faint vibrations of creatures moving above them. While hidden, it can raise or lower its body temperature, keeping the snow or ice around it from melting, or allowing it to glide through the cold tunnel.

A Remorhaz nest is quite a find, especially if you are a frost giant, as the young Remorhaz can be trained from hatching to obey commands and guard your citadels. Some might even become mounts for other creatures. Be careful if training these beasties, though; they are adept at swallowing their victims...