Narset, Enlightened Exile is a mythic Legendary Creature — Human Monk card from March of the Machine: The Aftermath (MAT), collector number 88. Current market price: $7.65 (foil $7.78), TCGplayer market prices via Scryfall.
Creatures you control have prowess. Whenever Narset attacks, exile target noncreature, nonland card with mana value less than Narset's power from a graveyard and copy it. You may cast the copy without paying its mana cost.