Reprints X-Men #39 and a 5-page story from Amazing Adult Fantasy #10
"The Faitful Finale"
The X-Men continue to battle on two fronts as they are able to stop both Factor Three teams from igniting WWIII. Both teams head back to Factor Three's hideout for one last battle with the evil mutants but Professor X exposes Mutant Master and the X-Men team up with the Evil Mutants to battle against the androids of Mutant Master, who is exposed as an alien, not a mutant. The team heads back to the institute where they get a costume change