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Kossak came to planet earth in part to recollect an alien called Pyra but was under the protection of Superboy. At the end of the attempted invasion, Kossak lost the battle to Superboy and vanished, unknown at this point if lived or not. Kossak appears to have great strength, agility and great resistance to injury. Kossak also possesses a club that allows him to hurt or kill any slave he owns and can hurl devastating energy blasts from it.