Grey Demesne

The  Grey Demesne  is the plane of shadow and the home of Orillion.

Description
The Grey Demesne is a monochromatic and imperfect reflection of the material plane. It overlaps both Equis and Noctis, and major landmarks on either can be found in their corresponding regions of the Grey Demesne, though often shifted somewhat or changed in shape.

Cities and settlements exist more or less in the same place as well, also appearing entirely in tones of grey and usually showing very bland, boxy architecture.

Inhabitants

 * Shadows,  most corresponding to the inhabitants of the material plane, walk the streets and roads of the Grey Demesne, but here they exist in three-dimensional form.
 * Svartalfar,  a dark-skinned, hairless elf-like race said to be the distant ancestors of the dark elves

Realms

 * The Heart of Shadow:  a giant city in the Grey Demesne that corresponds to no city in the material plane, it sits somewhere between Grey Noctis and Grey Equis. It is built around a huge but incredibly bland fortress with no entrance or openings, in which dwells Orillion, the plane's god.