HADES

Fiendish Plane

Forgotten Realms

The Gray Waste of Hades, also known as the Gray Waste, was an Outer Plane in the GREAT WHEEL cosmology model, home of the 'daemons'. Located at the midpoint of the Lower Planes, it was a plane of evil balanced between Law and Chaos.
Hades was a unique plane, as described by the GREAT WHEEL cosmology model, because it not only joined to adjacent planes in the GREAT WHEEL, it also held the foundation of Mount Olympus and the roots of @YGGDRASIL the World Ash. These two planar artifacts connected Hades to ARVANDOR, in the first layer of ARBOREA, allowing travel between Hades, the Upper planes, and Alternate PRIME MATERIAL PLANEs without going through the ASTRAL SEA, much like the WORLD TREE.