The Infinite Layers of the Abyss, sometimes called the Abyss or the Infinite Layers, is a chaotic evil realm in the outerplanes and home to the demons. The Abyss was born when the evil god Tharizdun plunged a shard of evil power into the what would one day become the Elemental Chaos. Like a tree, the shard took root and created a terrible realm of darkness, despair, gloom and evil. This is the Abyss.