On the moon of Oa, the being known as the Monitor was instantly aware of his counterpart, the Anti-Monitor (although his official name is the Monitor in his own universe, and he is often addressed as such, the name Anti-Monitor is used to distinguish him from his heroic positive matter counterpart). By this time the Anti-Monitor had quickly conquered Qward, as well as the rest of the Antimatter universe.[citation needed] In searching for other places to conquer, he also became aware of his counterpart. These two beings battled for a million years, unleashing great powers against each other, but to no avail.