Sleep Magic is a uncommon Enchantment — Aura card from Final Fantasy (FIN), collector number 74. Current market price: $0.21 (foil $0.29), TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step. When enchanted creature is dealt damage, sacrifice this Aura.