Constructed from the cast-off chassis of deactivated DECEPTICON® warriors, CYCLONUS was programmed by UNICRON® to be loyal only to GALVATRON®. Powered by nuclear engines, and a small fragment of his creator's supernatural power, CYCLONUS wields enough might to sterilize the surface of an inhabited world by himself. He never unleashes this power without his commander's leave, however, and he focuses all of his energy on ensuring that GALVATRON® is obeyed without question by those under his command.