Within the confines of the hellish zone of the Galaxy known as the Eye of Terror, the banished Chaos Space Marines, along with their exiled allies and slaves, have created their own Imperium of Chaos. In the most Chaos-saturated region of the galaxy, few in the ten thousand years of their exile have escaped mutation in some form. Within the Eye, the legions fight among themselves for gene-seed, resources, slaves, or for the greater glory of the Chaos Gods. The legions however are far more driven by their hatred of the Imperium than by internecine rivalry. From the Eye, the forces of Chaos Marines emerge to exact their vengeance upon the Imperium, continuing the Long War they begun ten thousand years ago. Chaos incursions range from the small scale but brutal raids which can occur anywhere in the galaxy, to the apocalyptic Black Crusades. Led by the Daemon Death Breeder of Chaos, Metallus, the forces of Chaos in all its forms unite to batter the fortress worlds close to the eye!