Altaïr Ibn-La'Ahad is a mythic Legendary Creature — Human Assassin card from Assassin's Creed (ACR), collector number 137. Current market price: $7.42 (foil $9.36), TCGplayer market prices via Scryfall.
First strike Whenever Altaïr attacks, exile up to one target Assassin creature card from your graveyard with a memory counter on it. Then for each creature card you own in exile with a memory counter on it, create a tapped and attacking token that's a copy of it. Exile those tokens at end of combat.