Almost From The Moment He Became Spider-Man, Professor X's Son, Legion, Is One Of The Most Powerful Mutants On The Planet. He Also Suffers From A Crippling Mental Disorder, Leaving His Psyche Splintered In Thousands Of Distinct Personalities. Six Of Legion's Most Dangerous Personalities - Each With Its Own Unique Abilities - Have Gone Rogue, Manifesting Themselves In The Real World. To Track Them Down, Professor X Has Gathered A Team That Includes Rogue, Gambit, Frenzy And Magneto. But Can Even The Most Powerful And Experienced X-Men Save Legion From Himself? Collecting X-Men Legacy #250-253.