Astral Plane

A plane that seems to cross most boundaries but ends at the Labyrinthine Wall. Some planes walkers say that the Wall was made from a portion of the Astral plane.

The astral plane is described as a barren place of other-dimensional nothingness extending in all directions. What little solid substance that floated in the bright, gray void was typically chunks of matter broken off from their original plane. The Astral plane has no gravity but objects did retain their mass so you could throw small items or push off from large objects to move in the weightless environment. 

Time in the Astral flowed at the same rate on a Prime Material plane but the effects of time are slowed almost to a stop. It may seem that a thousand years in the Astral plane can feel like only a day to the traveler. Mortal creatures do not go hungry or age while in the Astral plane. For that reason, its mortal inhabitants needed to return to the Lost Realm or other planes in order to have children or to age.