X-Men [Professor X; Cyclops; Jean Grey; Iceman; Beast; Angel]; Avengers [Giant-Man [Hank Pym]; Thor [Donald Blake]; Captain America [Steve Rogers]; Iron Man [Tony Stark]; Wasp [Janet Van Dyne]]; Lucifer (villain)
Xavier has tracked down Lucifer, who cost him the use of his legs, but finds his foe's heartbeat is rigged to a giant thermal bomb. The X-Men arrive in Bavaria and run across the Avengers who have also just arrived. The X-Men have to stop the Avengers from defeating Lucifer since by defeating Lucifer, the world will be destroyed. After Xavier gives Lucifer a mind blast that renders him unconscious, he contacts his team for help and the Avengers agree to let the X-Men clean up the current crisis on their own. Cyclops uses his eye beams to disable Lucifer's thermal bomb.
Fantastic Four [Mr. Fantastic; Invisible Girl; Human Torch [Johnny Storm]; Thing]; Alicia Masters; X-Men [Cyclops; Jean Grey; Iceman; Beast; Angel]; Mad Thinker (villain); Awesome Android (villain); Puppet Master (villain)
Puppet Master makes a model of Professor X and commands him to send the X-Men after the Fantastic Four. When Xavier regains control of his senses, the Mad Thinker sends in his Android to finish off both teams.