Dal Quor, the Region of Dreams

Mortal creatures come into contact with Dal Quor when they dream (except for elves, kalashtar, and warforged, which don’t dream). The outer fringes of the plane are shaped by the memories and experiences of dreamers. The dark core at the heart of the plane is shaped by the nightmare force known as the Dreaming Dark. The primary inhabitants of Dal Quor are the quori, enigmatic master manipulators that can inhabit the dreams of others.
Tens of thousands of years ago, the quori fought a bitter war with the giants of Xen’drik. The giants ended the war by severing the connection between Dal Quor and the Material plane and disrupting the cycle of the planes. As a result, Dal Quor is always remote in relation to the material realm, and no manifest zones are tied to Dal Quor. The only way to reach Dal Quor from the Material Plane is through the psychic projection of dreaming, and the quori are forced to possess mortal hosts to work their will on the material realm.