| Issue | #50 |
| Published | April 1987 |
| Cover Price | 1.25 |
| Pages | 52 |
| Editing | Ann Nocenti (editor); Jim Shooter (editor-in-chief) |
| Characters | Magik, S'ym, Limbo demons. |
| Genre | superhero |
| Pencils | Rick Leonardi |
| Inks | Dan Green |
| Characters | Professor X, Cannonball, Cypher, Karma, Magik, Magma, Mirage, Sunspot, Warlock, Wolfsbane; V: Magus, S'ym, future versions of Magma and Sunspot; GS: Starjammers (Binary, Ch'od, Corsair, Cr'reee, Hepzibah, Raza, Sikorsky, Waldo), Lilandra. |
| Synopsis | S'ym, now infected with the transmode virus, challenges Magik; Magik flees to Professor Xavier and updates him on recent events; they rescue the other New Mutants; Cypher figures out a way to defeat Magus; Warlock "adopts" Professor X as his father. |
| Genre | superhero |
| Script | Chris Claremont |
| Pencils | Jackson Guice |
| Inks | John Beatty |
| Colors | Glynis Oliver |
| Letters | Tom Orzechowski and L. Lois Buhalis |
| Notes | Double-sized issue. Professor X appears here following Uncanny X-Men #203. |