Izzord, Dungeon Fiend

Flying, Deathtouch
{2}: Exile a card from your hand and put a bone counter on it. (As long as the card has a bone counter on it, you may cast it without paying its mana cost and then draw a card.)
If you cast a spell from exile with a bone counter on it, destroy a creature or enchantment an opponent controls with mana cost equal or less to how many spells you cast from exile this turn.