Quasielemental Plane of Dust
From Multiversal Omnipedia
The Quasielemental Plane of Dust is one of the Quasielemental Planes, formed where the Elemental Plane of Earth meshes with the Negative Energy Plane. The Quasielemental Plane of Dust is a vast wasteland, where all eventually succumb to the decaying forces there. The Doomguard have a base, Citadel Alluvius, there.