The Void

Beyond the larger aether The Void stretches eternal. The study of The Void is almost impossible due to the absence of mater, mana, or anything tangible that we mortals can study. The Void is the sheer absence of anything that we mortals understand. To see The Void is to see nothingness itself. Those who have been unlucky to witness it's glory have all gone mad from just one look. Inside that void exists an endless ocean, one that the early schoolars called The Astral Sea.

— Guide To Interplanar Travel By Silverlight Daemion