The orcs believe Sek'Kuar still lives in the Karplusan Mountains, gathering his dead army, intent on revenge.

Commander Masters

Sek'Kuar, Deathkeeper

Whenever another nontoken creature you control dies, create a 3/1 black and red Graveborn creature token with haste.

Commander 2013

Whenever another nontoken creature you control dies, put a 3/1 black and red Graveborn creature token with haste onto the battlefield.

Commander 2013 Oversized

Karplusan legend told of an orc so cruel that he burned his own followers in rage—yet so revered that they rose from their pyres to serve him.

Coldsnap

Whenever another nontoken creature you control is put into a graveyard from play, put a 3/1 black and red Graveborn creature token with haste into play.