The Anti-Monitor is a rage-fueled and murderous cosmic entity with an inert drive to destroy all life and positive matter in the multiverse, leaving only his Antimatter Universe in existence. The eternal enemy of his positive matter counterpart, the Monitor, he caused a massive multiversal crisis to destroy all of existence, and later joined the Sinestro Corps. Oa started out as a peaceful planet with citizens of vast mental abilities and ambition.
