Not really a god, but a plane of absolute nothingness worshiped by cultists as a deity.  Somehow, the plane's mysterious power allows this, and it grants devine domain power.  Some say that the true answers to all may actually be hiding at the core of the Void.  The similarities between it and the Great Omniscience are hard to miss, but the differences are just as clear.  The Void has no favored weapon, so spells that involve it never work. It's symbol is usually just black space, or filled completely with darkness.