Meta-World

The Meta-World is a plane outside of the physical reality, which seems to be a place where Witches and Sorcerers can chose to reside. Those who are designated Game Master can use this world's latent but unused energy to create the game; a game is used to recreate an event and let it play out, however were a logic error to occur, the game would instantly end, so Game Masters must be very careful. A game is used to benefice the observances of the Game Master, while a opposite observer may try to find fault in these occurrences. It is of note that other entities may freely travel to this place if capable of doing so or summoned, but may not interact at all had a game already been set.

The Meta-World was widely used during the Rokkenjima Incident to reproduce the events from October 4th to October 5th of 1986, where the Rokkenjima Massacre occurred. During these events, the Meta-World looked no different than the real Rokkenjima, save for a few locations existing outside games: The Purgatorio Room, The Witch's Smoking Room(A normal room where games are arranged) and the City of Books(A location of the witch society only accesible to members of the Witch Senate)

Season 3
Donte and Vorgil were seen in what appeared to be the Rokkenjima Mansion, very probably being in a game of their own in the Meta-World along with the rest of the 17 missing persons.