Meria, Scholar of Antiquity is a rare Legendary Creature — Elf Artificer card from Dominaria United Promos (PDMU), collector number 206p. Current market price: $0.33 (foil $0.42), TCGplayer market prices via Scryfall.
Tap an untapped nontoken artifact you control: Add {G}. Tap two untapped nontoken artifacts you control: Exile the top card of your library. You may play it this turn.