Also known as Spawn of Chaos, the Chaos Spawn is a nasty-looking monstrosity from the Realm of Chaos, living only through the forces of pure chaos that keep its mutated and mutilated body together. It was once a mortal follower of Chaos, and is an example of the destiny which awaits those who give their bodies and souls over to the corruption of the Gods of Chaos.
Warriors of Chaos receive Gifts of Chaos, permanent mutations that may help them in future battles for their Chaos god. If the warrior receives too many gifts and is unable to endure any more, he can become a Chaos Spawn. Alternatively, a Chaos Spawn could simply be a warrior who has spent too much time in contact with the warping power of Chaos, and has mutated without direct action by a Chaos God. A Spawn is a wildly mutated beast and is generally insane or non-sentient, living the remainder of its existence at the whim of its god or its fellow warriors, killing everything in its path.