Alexios, Deimos of Kosmos is a uncommon Legendary Creature — Human Berserker card from Assassin's Creed (ACR), collector number 134. Current market price: $0.35 (foil $0.36), TCGplayer market prices via Scryfall.
Trample Alexios attacks each combat if able, can't be sacrificed, and can't attack its owner. At the beginning of each player's upkeep, that player gains control of Alexios, untaps it, and puts a +1/+1 counter on it. It gains haste until end of turn.