Anti-Monitor

The Anti Monitor is a character from DC

History
The Anti-Monitor is The Monitor's counterpart from The Anti-matter Universe. He is responsible for the original Crisis on Infinite Earths, was the sole Guardian of The Sinestro Corps and once, against his will, was the source of The Black Lantern Corps Central Power Battery.

More Information: http://comicvine.gamespot.com/anti-monitor/4005-12165/