ANTI-MATTER UNIVERSE
Separate to our own is a mirror universe composed entirely of anti-matter, a form of matter composed of particles with the same mass but opposite charge and quantum spin as normal matter. The universe can be accessed by various means but a method of reversing the atomic properties of the component matter of the traveller is required. Such a bridge was created by the Weaponers of Qward in their battle with the Green Lantern Corps. Qward itself occupies the centre of the Anti-Matter Universe in much the same way as Oa is located at the centre of the positive-matter universe. For a considerable time the Anti-Matter Universe was ruled by the Anti-Monitor before his defeat at the hands of Earths heroes during the Crisis. It has been stated that the Anti-Matter Universe is the home of the Crime Syndicate now that Earth-Three has been retconned out of existence. However it is has not been established if this Anti-Matter universe is the same as the one encountered by the modern Justice League.