Mind Freeze

Enchant player
Whenever enchanted player casts a spell, that player may pay {3}. If he or she doesn't, exile it with one time counter on it. If it doesn't have suspend, it gains suspend. (At the beginning of its owner's upkeep, remove a time counter from that card. When the last is removed, the player plays it without paying its mana cost. If it's a creature, it has haste.)
"You really thought you could outsmart me?"
- Helena, the Frost Mage