Ezuri, Stalker of Spheres is a rare Legendary Creature — Phyrexian Elf Warrior card from Phyrexia: All Will Be One Promos (PONE), collector number 201p. Current market price: $0.75 (foil $0.62), TCGplayer market prices via Scryfall.
When Ezuri enters, you may pay {3}. If you do, proliferate twice. Whenever you proliferate, draw a card.