Permafrost Trap

Type: Instant — Trap

Mana cost: {2}{U}{U}

Card text: If an opponent had a green creature enter the battlefield under their control this turn, you may pay {U} rather than pay this spell's mana cost. Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Rarity: uncommon

Artist: Howard Lyon

Released: February 5, 2010