Sokrates, Athenian Teacher is a rare Legendary Creature — Human Advisor card from Assassin's Creed (ACR), collector number 67. Current market price: $1.13 (foil $0.60), TCGplayer market prices via Scryfall.
Defender Sokrates has hexproof as long as it's untapped. Sokratic Dialogue — {T}: Until end of turn, target creature gains "If this creature would deal combat damage to a player, prevent that damage. This creature's controller and that player each draw half that many cards, rounded down."