The information in this article is from a fan game or fan fiction and is therefore not canon.
Dreamworld (aka Realm of Dreams) is a world ruled and controlled by the Silver Cloak Society. This region is likely inspired by the Dreamland in KQ7.
Background[]
The Silver Cloak Society were the masters of a lost form of magic that controls dreams. They could not only control dreams but shape them into whatever they wished. They could drag people into the Dreamworld and even make dreams appear in the waking world. Even the most powerful of them could form reality from dreams themselves. They were very secretive but a force of good.
Behind the scenes[]
In the POS universe according to developers Mab (unofficial) is the sister of Dream Weaver (unofficial). They apparently see no relationship to Titania (unofficial).