One of the Cosmology. The Feydark is described as a fairytale-esque dimension in which many of the stories of old and myth appear as reality. Usually however, they take on a nightmarish or gruesome form, or at the very least an unnerving one. Some have speculated Gnomes originate from the Feydark.
Some have compared the plane of Deep Gray to the Feydark for its dreamlike feeling. In this comparison, the Feydark is usually described as a nightmare as opposed to a mere dream.