Deciding to retire permanently, Luthor returns to Lexor and learns he has fathered a son by Ardora, Lex Luthor Jr. He spends the next several weeks with his new family before discovering Lexor suffers from the same planetary instability that destroyed Krypton. While creating a "Neutrarod" tower to stabilize the planetary core, Luthor's pathological hatred for Superman resurfaces and he reflects on feeling unsatisfied in life without their conflict. The villain then unearths an ancient underground laboratory of great technology, a relic from Lexor's lost age. After one of Luthor's still-active satellites threatens the people of Earth, he concludes Superman will soon come to Lexor to take him back to Earth authorities. With the underground lab's resources, he spends weeks creating a "warsuit" — highly destructive, flight-capable power armor — to finally match the Kryptonian in physical combat and counter his powers. To test the suit, Luthor performs several acts of destruction on Lexor, feigning ignorance when he hears about the "mystery marauder" and telling Ardora he has no knowledge of the armored man.