Central Elevator // Promising Stairs - Duskmourn: House of Horror - 336

Enchantment — Room

Mana Cost: {2}{U}

At the beginning of your upkeep, surveil 1. You win the game if there are eight or more different names among unlocked doors of Rooms you control.
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Rare · Duskmourn: House of Horror · #336 (DSK)

Illustrated by Ivan Shavrin