Painter's Studio // Defaced Gallery - Duskmourn: House of Horror - 147

Enchantment — Room

Mana Cost: {1}{R}

Whenever you attack, attacking creatures you control get +1/+0 until end of turn.
(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.)

Uncommon · Duskmourn: House of Horror · #147 (DSK)

Illustrated by Marc Simonetti