Mar Tuuk is a separatist commander that died during the clone wars or died of old age due to he hid from the Galactic Empire. His body was reborned the same way the other demon generals were reborned: Hatching from a cocoon as a cape wearing monster. As a Demon General he is in charge of torturing the Sith Legions POWS including the infamous use of the electric shock collar which he uses to torture the prisoners with electicity. This demon general wore scary sith armor but when he transforms he turns into a monster form that is a cross spider/crab. He died when the Autobots were freed from his make things scream in agony methods and was killed when the Autobot cars ran him over and over again.