Naug-hut, Frost-Hearted

+1: Exile target permanent. At the beginning of the next upkeep, return it to the battlefield tapped.
-2: Put two frostbite counters on target creature. Whenever that creature becomes tapped, remove a frostbite counter and put a -1/-1 counter on it.
-X: Exile X nonland permanents with different converted mana costs. Add X blue mana to your mana pool.