Party Thrasher is a rare Creature — Lizard Wizard card from Modern Horizons 3 (MH3), collector number 129. Current market price: $0.79 (foil $0.62), TCGplayer market prices via Scryfall.
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 first 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.