The New Mutants #26 key 1st appearance of Legion is a highly sought-after comic book from April 1985 by Marvel Comics. Written by Chris Claremont and illustrated by Glynis Oliver and Bill Sienkiewicz, this issue features characters like Magneto, Banshee, Mirage, Reverend Craig, and more. The cover art by Bill Sienkiewicz adds to the appeal of this collectible comic book from the Copper Age, making it a valuable addition to any comic book collector's collection.