X-MEN #9 1st meets AVENGERS 1965 MARVEL GIRL Pinup 1st LUCIFER Lee KIRBY CGC 6.5

Professor X detects a threat from his longtime enemy Lucifer, whose actions once crippled him. The X-Men confront the villain, while the Avengers become involved due to misunderstandings and conflicting objectives. What follows is the first encounter between Marvel's two premier superhero teams before they eventually unite against the larger danger.