House of Mystery

The House of Mystery is a unique item, old as humanity itself. It is a tiny echo of the mighty Demiurge, a 'spawnling' possessed of limited intelligence and power. The dimension was created as a cap on the hole in reality created by Morgana Le Fay and her abuse of the Cosmic Cube. It was sealed by Merlyn and the Vishanti to guard against encroachments from the Realm Between Worlds.

The House of Mystery assembled itself into a home of sorts after Cain was banished there with his brother Abel. For millennia the two men dwelt there, often contacted by Dream or his minions as humanity whipped itself along the path of evolution. Dream and the other Endless banished Cain and Abel to the House for a timeless epoch, hoping that time would heal all wounds. It largely has not worked.

Sometime in the early 20th century, the immortal witch Elvira became steward of the House. She maintained it until 1975, when the magus John Constantine was appointed steward by the House. John maintains he won it in a friendly game of poker; Elvira insists that it was strip poker, there were a few extra-dimensional beings showing poor hands, and John swindled her after promising to throw his hand so she could clean them out.