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Permafrost Trap
Magic: The Gathering
Set
Worldwake
Rarity
uncommon
Type
Instant — Trap
Collector number
34
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.