Little is known about the entity known as Pestilence. As one of the four Harbingers of the Apocalypse, Pestilence is an eternal enigma dedicated to the complete and utter corruption of all life in the Realm of Domexus, nay, the universe! Pestilence sends forth his minions, the Pestilent Bosses, and draws forth twisted reflections of his enemies from the dark edges of their consciousness. Few Apocalypse Cats have faced the Harbinger, and none have lived to tell the tale. Those who succumb to his infestation become… something else. Will you be the first Cats to defeat the Harbinger and bring an end to the eternal war?