X-Men (1991 1st Series) #2

Direct Edition. Cover pencils by Jim Lee, inks by Scott Williams. Firestorm, script by Jim Lee (Co-Plotter) and Chris Claremont, pencils by Jim Lee inks by Scott Williams 

The Prof and X-Men Blue are captured and taken to Asteroid M; Magneto discovers that Moira altered his genetic structure when he was a child in her care; The rest of the X-Folk are told they must rescue their team-mates before the Magneto Protocols are implemented.