X-Cutioner's Song
"X-Cutioner's Song" is a crossover storyline published by Marvel Comics' in twelve parts from the November 1992 to early 1993. It ran in Uncanny X-Men, X-Men (vol. 2), X-Factor, and X-Force, and featured Stryfe as the central villain. The story was heavily hyped as revealing the origin of popular X-Force star Cable, but ultimately Cable's origin was not covered in any of the installments.
The main issues of the crossover were sold polybagged with a special trading card that featured Stryfe's personal views of key characters from the crossover. Because of this, the issues themselves were priced at $1.50, twenty-five cents more than their normal price of $1.25.
Plot
Mutant pop-star Lila Cheney organizes a free concert in Central Park to promote diversity in society and invites Professor Charles Xavier to speak at the concert. His speech is interrupted by Stryfe who, disguised as his doppelganger and nemesis Cable, shoots Xavier with a bullet that infects the professor with a lethal strain of the Techno-organic virus.