Quasielemental Plane of Dust

That's the goal of the universe, the clearest picture of entropy there is - so a Doomguard would say if he could show anyone the eternal sea that is Dust. It's the end as they figure it was meant to be. Perhaps it's their vision of paradise.

At the border of the Elemental Plane of Earth, this plane starts as a dusty expanse, broken free of the endless caverns. A traveler's pretty happy to escape the closeness and step into the dark, open world. Farther on, the dust reaches up to his knees. It's thick and it pulls against him. Close to the Negative Energy Plane it becomes an abrasive sea that chafes as a traveler swims through the grit.

Note: The Quasielemental Plane of Dust originally appeared in the Planescape AD&D campaign setting from TSR. Its use here is for the purposes of providing context for the campaign only.