Mallus's realm

Mallus's realm, also known as the spirit world or the dark dimension, is an extra-temporal dimensional prison which served as both the prison and the lair of Mallus, where he resided alongside a variety of demons and magical creatures. It was opened by the Legends so they could kill Mallus, allowing the rest of its inhabitants to escape. Besides Mallus, it appears this realm is a place that humans send any magical creature they did not understand.

History
At some point in the past, the ancient tribes of Zambesi came together to banish Mallus to this realm using the totems.

At some point in the past, some humans banished the Fairy Godmother to this realm for what seemed to her like an eternity.

At some point in the past, some humans banished Charlie to this realm for long enough to know she doesn't ever want to go back.

The Legends opened this realm so Mallus could be freed and they could defeat him once and for all. In doing so, other creatures managed to escape as well.

Former residents

 * Baba Yaga
 * Charlie
 * Chupacabra
 * Dragons (one deceased)
 * Fairy Godmother (banished to Hell)
 * Kaupe
 * Magic plant creature (deceased)
 * Mallus (deceased)
 * Shtriga
 * "Chad Stephens" (deceased)
 * Unicorns (one banished to Hell)

Behind the scenes

 * In the comics, The Dreaming (or just The Dream) is a metaphysical realm on the outskirts of the multiverse inhabited by beings from classical fairy tales and fantasy.