When you unlock this door, search your library for a Room card that doesn't have the same name as a Room you control, reveal it, put it into your hand, then shuffle.
(You may card either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
![Central Elevator // Promising Stairs [Duskmourn: House of Horror Prerelease Promos]](http://www.cosmicgames.com/cdn/shop/files/3b6245c6-0eb3-4821-bd62-6b0adb6fd481_133ac264-1cb0-4fab-af96-b457db274cb0.png?v=1773413788&width=1445)
