Poison-Blade Mentor is a uncommon Creature — Human Assassin card from Assassin's Creed (ACR), collector number 288. Current market price: $0.30, TCGplayer market prices via Scryfall.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Whenever this creature attacks, another target Assassin you control gains deathtouch until end of turn.