Antimatter universe

Billions of years ago, a Maltusian scientist named Krona, performed a forbidden experiment in an effort to see the origin of the universe. His irresponsible actions disrupted the process of cosmic creation, resulting in an additional, opposite universe.

The antimatter universe is also the location of the planet known as Qward.

The Weaponers of Qward (devoted adversaries of the Guardians of the Universe) have frequently crossed swords with their dimensional counterparts, the Green Lantern Corps. To aid them in their efforts to destroy the Guardians, they have frequently relied upon the aid of a former Corps member, Sinestro.