Collects X-Men vs. the Avengers #1-4 and Uncanny X-Men (1963) #9.
When Magneto's on trial, he needs all the help he can get - he finds it in the remnants of his former fortress, Asteroid M! The X-Men aren't sure what his scheme is, but they're positive they don't want the Avengers and the Soviet Super-Soldiers to find out first! Multi-team warfare with the eyes of the world on all three! Also featuring the X-Men's fabulous first fight with the Avengers, to keep them from unleashing the legendary Lucifer!