 Judging their proxy rule of Earth to be impractical, they decide to withdraw from the planet and destroy all life through a device that will block the sun's rays.Meanwhile, the Neeg-parts have seized a cache of weapons developed by Rudolph Balkani during the war — machines that turn illusions thought up by their users into reality, and a 'hell-weapon' that was never used against the aliens, as it would destroy humanity as well.After most of his troops desert due to the psychological problems caused by the illusion machines, Percy X is finally defeated by an army of robots created by Gus Swenesgard.