Klee, Pyro Prodigy

Haste
Whenever Klee deals combat damage to a player,
you may cast an instant or sorcery spell from your
hand with converted mana cost equal to or less than
the number of creatures you control. If you cast a
spell this way, exile it instead of putting it into your
graveyard.
{2}{r}{r}, {t}: Klee deals X damage to each creature
and each opponent, where X is the number of spells
you've exiled with her ability this game.