Lex Luthor of Earth-One teams up with Alexei Luthor of Earth-Two. It is shown that Alexei is arguably colder and more villainous, perfectly willing to destroy all of Earth in order to prove his superiority, whereas Lex hesitates to do so because he had no desire to rule a lifeless world and doesn't want his sister to die. They even extend their alliance to Ultraman when Earth-Three's Lex Luthor is a good guy. All three villains were defeated by Superman of Earth-One, Superman of Earth-Two, and Lex Luthor of Earth-Three.