Necropolis of Erebos
Dwelling place of Thanatos, Dark God of Death and Evil Magic. Erebos is a city deep within The Place Which Is No More that is sealed off from the rest of the dimension by a paling raised by Chrystalis. It is a terrible and frightening city that exists in a perpetual state of darkness, and the land itself is diseased; nothing green is able to grow there.
Thanatos and his surviving minions were banished there, in the wake of their defeat in the Great War.