Luthor's clone body eventually begins to deteriorate, causing him to lose his hair and age at an accelerated rate, a side-effect of a disease affecting all clones. Lois Lane discovers proof of Luthor's clone harvesting and false identity and exposes him with help from Superman. Desperate to evade arrest, Luthor activates technology left on Earth by Brainiac, destroying large sections of Metropolis in the process. In the end, Luthor becomes a prisoner in his own body, unable to move or even blink, internally swearing vengeance on Superman. During the crossover Underworld Unleashed, the demon lord Neron offers Luthor full health and vitality in exchange for services and his soul. Not believing in the existence of souls, Lex agrees and is restored, regaining the physical fitness of his Lex II body but again lacking head and facial hair, and is physically approximately in his true age. His soul is later restored after Neron is defeated by Captain Marvel and the Trickster. Returning to Metropolis, Luthor submits to a trial. He claims all his crimes were committed by a violent clone created by renegade scientists from Cadmus Labs who secretly held the true Luthor hostage. Luthor is acquitted of all charges. He later arranges to reacquire his old kryptonite ring.