In a room with no doors, the King of Keys hordes all his treasures. Even his stolen Power can be found here, and many an adept journeys into the mansus Mansus to gain access to it. few Few return. 

A labyrinthine section of the mansus, within which the Heartless Chest is rumored to be found. Three entrances have been reported, but to exit it one must have the favor of the King of Keys. As all wise adepts know, Heartless Jack offers help to all, but helps no one.  The Knotted Halls reach many places, but the path is winding and no known exits exist.  The Card Saints, those spirits in service of King-as-Dealer, who offer a game of skill, wit and chance to people in the Know, or dreamers with wild goals they can't achieve in the Wake.