The Dreaming Dark is the monicker of the most powerful entity of the Dream Realm of Dal Quor, a being also known as il’Lashtavar. il’Lashtavar commands the Quori spirits, nightmarish beings that rule Dal Quor and feed upon the fear of sleeping mortals.
The Dreaming Dark is also the name of a wide-spread organization throughout Eberron dedicated to following the guidance of il’Lashtavar. The Dreaming Dark are comprised of Quori spirit followers of il’Lashtavar as well as a group of humans called the Inspired, individuals bred and trained to serve as vessels for the Quori.
The Dreaming Dark organization primarily acts on the behalf of il’Lashtavar to prevent the “Turning of the Age,” an event that would destroy Dal Quor and rebuild it in a new form, killing il’Lashtavar and the Quori. A small fraction of the Quori broke from il’Lashtavar’s ranks and are actively seeking a way to turn the age from one of darkness and nightmares to one of purity and light. These Quori merged with willing human hosts to form the kalashtar race, of which Tivira is one. Thus, the Dreaming Dark largely seek the complete destruction of the kalashtar race.