Weakstone's Subjugation - The Brothers' War - 72

Enchantment — Aura

Mana Cost: {U}

Enchant artifact or creature
When this Aura enters, you may pay {3}. If you do, tap enchanted permanent.
Enchanted permanent doesn't untap during its controller's untap step.

Common · The Brothers' War · #72 (BRO)

Illustrated by Igor Kieryluk