Eladamri, Korvecdal is a mythic Legendary Creature — Elf Warrior card from Modern Horizons 3 (MH3), collector number 149. Current market price: $9.10 (foil $10.30), TCGplayer market prices via Scryfall.
You may look at the top card of your library any time. You may cast creature spells from the top of your library. {G}, {T}, Tap two untapped creatures you control: Reveal a card from your hand or the top card of your library. If you reveal a creature card this way, put it onto the battlefield. Activate only during your turn.