Khund

From superman.nu: Supermanica

The Khund

Futuristic and violent alien invaders of the 30th century, the Khunds first threaten Earth and the Legion of Super-Heroes using the traitor Nemesis Kid as their contact. In Superboy and the Legion's battle against the interlopers, the formerly-suspected Karate Kid proves invaluable in smashing the alien fleet (Adv No. 347, Aug 1966: The Traitor's Triumph!").