Intruder Alarm [Mystery Booster] Nightmare Horse Then if your library has

Then if your library has no cards in it

Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {U} Search your library for an instant or sorcery card

Set: Commander Legends: Battle for Baldur's Gate Prerelease Promos Type: Artifact — Equipment Rarity: Rare Cost: {1} Equipped creature has deathtouch and lifelink

Set: Strixhaven: School of Mages Mystical Archive Type: Instant Rarity: Rare Cost: {2}{G} Split second (As long as this spell is on the stack

Intruder Alarm [Mystery Booster] Nightmare Horse Then if your library hasSet: Mystery Booster Type: Enchantment Rarity: Rare Cost: {2}{U} Creatures don't untap during their controllers' untap steps. Whenever a creature enters the battlefield, untap all creatures. One footstep among many is silent. One footstep alone is deafening.