Not seen a manip of her since the Tournament of Heroes.

The Dreamqueen is the daughter of Nightmare, the lord d the Dream Dimension and Zhilla Char, a demon succubus who attacked men in their dreams eight hundred years ago. Once, when wandering through the borders of Nightmare's domain, Zhilla Char was captured by Nightmare, who impregnated her and exiled her to a pocket dimension. According to the nature of the kind of demon she was, Zhilla Char was consumed in flames as she went through the process of giving birth. When the flames died, the unclothed, adult form of the demoness that became known as the Dreamqueen remained in her place. Zhilla Char's kind of demon "becomes" her own child. Zhilla Char?s daughter, the Dreamqueen, possessed her mother's memories, just as Zhilla Char had retained those of her own mother.
Awakening in the pocket dimension of ethereal "sub-matter" to which Nightmare had exiled her mother, the Dreamqueen used her powers to reshape it into a world that suited her fantasies, even creating a rate of people to serve her.
In her own dimension the Dreamqueen can magically reshape matter according to her will, and could even create living beings from that matter. However her magical powers were more limited on Earth. She cannot reshape matter on Earth, but she can magically alter the perceptions of other people, causing them to see and hear hallucinations. A person who believes to be killed by someone or something that is actually an illusion created by the Dreamqueen actually would die as a result.