The Great Void is the infinite space surrounding the Material Plane, the Astral Plane, and the Netherworld. It is primeval - it has always existed. It is not a place where physical beings can survive, and thus its only inhabitants are the equally primeval Ten Voidgods who brought all other things into creation. The Voidgods exist purely as a state of being; they possess no physical bodies, but are simply a conglomeration of wills. They have never left the Great Void, as they are able to observe all creation (and alter it) from within its vastness.