Tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

• Number: 37
• Rarity: C
• Type: Sorcery
• Mana cost: 1U
• Color: Blue
• Artist: Raymond Swanland