The Legion works also featured a force field called AKKA which can erase from the Universe any matter, of any size, anywhere, even a star or a planet. AKKA was a weapon of mass destruction and the secret of it was entrusted to a series of women. AKKA was used in the past to overthrow the Purple tyranny. It was also used to wipe out most of the Medusae, though they had tried to steal the secret. When they were wiped out, the Moon where they had established their base was erased out of existence. At the end of the story, John Ulnar falls in love with the keeper of AKKA, Aladoree Anthar, and marries her. Aladoree Anthar is described as a young woman with lustrous brown hair and gray eyes, beautiful as a goddess.