Silvergill Adept is a uncommon Creature — Merfolk Wizard card from Rivals of Ixalan (RIX), collector number 53. Current market price: $0.29 (foil $0.78), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, reveal a Merfolk card from your hand or pay {3}. When this creature enters, draw a card.