Demon World

Demon World is a realm in which the demons summoned in the New World originate from.

Background
A termed coined by the inhabitants of the New World to explain the origin of the demonic. According to the Bloody Emperor the Demon World is suppose to be another plane of existence. The Demon World is alluded many times, though very little knowledge is actually known about the realm.

Trivia

 * Unlike the other Worlds in Overlord the Demon World has yet to be confirmed to actually exist.