Cramped Vents // Access Maze - Duskmourn: House of Horror Commander - 17

Enchantment — Room

Mana Cost: {3}{B}

When you unlock this door, this Room deals 6 damage to target creature an opponent controls. You gain life equal to the excess damage dealt this way.
(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 Commander · #17 (DSC)

Illustrated by Arthur Yuan