Frost worms are fearsome, gigantic, arctic predators who use the crisp arctic air as a medium to broadcast their trilling noise, which hypnotizes their prey.
Frost worms lurk, covered by snow, waiting patiently for potential food to come near. When it does, frost worms open combat with their high-pitched trill, a noise that stuns those who hear it. They employ an ice breath attack to soften up large groups of prey, and finishes off its enemies with a lunging mandible bite, relying on the intense cold its body generates to finish the job if the bite does not. Unusually, a dead frost worm becomes unstable, exploding in a burst of cold and ice shards.
Frost worms and remorhazes seem to have some antipathy, as the former attacks the latter on sight.
Some tribes domesticate frost worms, raising them from hatching to defend the community. They can even be ridden, provided one is protected from the numbing cold of their bodies.