Burning Chorus

(Whenever you cast a Chorus spell, exile it after
it resolves. Whenever you cast a Song spell, you
may cast a copy of any Chorus spell you own in
exile by paying it's converted mana cost. If you
cast a Song spell and don't cast a copy of an
exiled Chorus spell, return all Chorus spells you
own from exile to your graveyard.)
Deal 1 damage to any target.