Apollyon is one of the members of the Chimera, a reality inhabitated by a race of reptiloid superbeings born from the many travels of the Authority to the Bleed. Member of the Higher Power, he opposed to the Monarchy from the main Wildstorm earth.
When the Monarchy attacked directly to Axis Olympia, the heart of Chimera, Apollyon fought directly against Union and fell to his attack, terminally.