Inner Planes

The Inner Planes is a term from Dungeons & Dragons introduced in the Planescape setting. It is a way of collectively referring to the planes that make up the "center" of the Great Wheel cosmology; the Elemental, Astral, Ethereal and Prime Material planes. By the admittedly biased beliefs of Sigilites, the Inner Planes are seen as, effectively, the boonies of the multiverse, being centered around more physical components than the more esoteric components of the Outer Planes, which are the realms of the dead and literally embodiments of the various moral alignments.