Chasm Spawn

Chasm Spawn crawl out of the Black Chasm and then wander Bastonne, attacking and trying to eat anything in their path, including Humans, horses, rocks, and trees. They seem to be almost mindless, but they are dangerous all the same.

They look rather like enormous frogs and can leap long distances, though they prefer not to. Each is about ten feet tall at the shoulder, larger than many peasant houses. Their skin is black and tough rather than slimy.

Young Chasm Spawn have never been observed, but the stability of their shape means that most scholars believe they have nothing to do with Chaos. A few scholars would love to sponsor an expedition to the depths of the Chasm to find out more, as long as they don’t have to go along.

Source

 * Warhammer Fantasy RPG 2nd ED -- Knights of the Grail (pg. 55).