Karlach, Tiefling Guardian is a rare Legendary Creature — Tiefling Barbarian card from Alchemy Horizons: Baldur's Gate (HBG), collector number 14g.
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, another target creature you control gets +4/+4 until end of turn.