Arno Dorian is a uncommon Legendary Creature — Human Assassin card from Assassin's Creed (ACR), collector number 139. Current market price: $0.22 (foil $0.28), TCGplayer market prices via Scryfall.
Deathtouch Other Assassins you control get +2/+0. Disguise {B}{R} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.)