Karlach, Tiefling Zealot

Legendary Creature — Tiefling Barbarian4/4

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, create a 2/2 white Knight creature token. Creatures you control get +1/+1 and gain haste until end of turn.

Not legal in Commander