Sleeping Potion - Planeshift - 34

Enchantment — Aura

Mana Cost: {1}{U}

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
When enchanted creature becomes the target of a spell or ability, sacrifice this Aura.

Common · Planeshift · #34 (PLS)

Illustrated by Daren Bader