A mote of alien thought given form and flesh, Thruun is not of this world. He dwells in an icy prison, awaiting a time when the world will be right for his coming. As his age of freezing darkness draws near, his brood begins to appear, stalking the wastes in preparation for his reign. If he is released from his prison, the entire world will be covered in a deadly glacier, removed from light and hope for all time.

Imprisoned somewhere in the Spine of the World with a caller held beneath the stone in Dougan’s Hole .

In appearance, Thruun resembles a large ape-like beast about the size of a horse. Its body covered with thick shaggy white fur. Its powerful ape-like arms are clawed, .

When summoned to Icewind Dale, it wore a necklace of twenty hands, removed from victims as a part of the summoning ritual.