Karlach, Tiefling Berserker is a rare Legendary Creature — Tiefling Barbarian card from Alchemy Horizons: Baldur's Gate (HBG), collector number 14r.
First strike, haste When this card specializes from your graveyard, return it from your graveyard to the battlefield. It perpetually gains "This creature can't block." When this card specializes from any zone, target creature an opponent controls can't block this turn.