Glen Elendra Archmage is a rare Creature — Faerie Wizard card from Ultimate Masters (UMA), collector number 58. Current market price: $9.92 (foil $13.84), TCGplayer market prices via Scryfall.
Flying {U}, Sacrifice this creature: Counter target noncreature spell. Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)