*Name: Permafrost Trap
Type: Instant - Trap
Play Cost: 2 Colorless, 2 Island
Game Text: If an opponent had a green creature enter the battlefield under his or her control this turn, you may pay I rather than pay Permafrost Trap's mana cost.
Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.
*Source: Front of card