Party Thrasher

Noncreature spells you cast from exile have
convoke. (Each creature you tap while casting
a noncreature spell from exile pays for {1} or
one mana of that creature's color.)
At the beginning of your precombat main
phase, you may discard a card. If you do,
exile the top two cards of your library, then
choose one of them. You may play that
card this turn.