Karlach, Raging Tiefling 
Legendary Creature — Tiefling Barbarian
First strike
Rage Beyond Death — Specialize 
. You may also activate this ability if Karlach, Raging Tiefling is in your graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL