- Script
- Chris Claremont (credited)
- Pencils
- Butch Guice (credited as Jackson Guice)
- Inks
- Kyle Baker (credited)
- Colors
- Glynis Oliver (credited)
- Letters
- Tom Orzechowski (credited)
- First Line of Dialogue or Text
- Professor Xavier's School for Gifted Youngsters -- -- home of the Uncanny X-Men...
- Genre
- superhero
- Characters
- Morlocks: Callisto; Sunder
New Mutants: Cannonball [Sam Guthrie]; Cypher [Doug Ramsey]; Karma [Xi'an Coy Manh]; Magik [Illyana Rasputina]; Magma [Amara Aquilla]; Mirage [Dani Moonstar]; Sunspot [Roberto Da Costa]; Warlock; Wolfsbane [Rahne Sinclair]
X-Men: Colossus [Piotr Rasputin] (guest); Nightcrawler [Kurt Wagner] (guest); Rogue (guest); Shadowcat [Kitty Pryde] (guest); Storm [Ororo Munroe] (guest)
Tom Corsi; Sharon Friedlander; Lockheed; Moira MacTaggert; Magneto [Erik Lehnsherr]; Magus (villain); Psylocke [Betsy Braddock]
- Universe
- Marvel : mainstream
- Synopsis
- The X-Men return to the school from their battle in the Alley, with casualties. Magik brings Moira to help. the New Mutants try to help, but just get in the way. Karma's siblings are kidnapped. Magus attacks the New Mutants, and Magik teleports them away.
- Reprints
- in Titans (Editions Lug, 1976 series) #112 (10 mai 1988)
- in X-Marvel (Play Press, 1990 series) #24 (Marzo 1992)
- in X-Men Mutant Massacre (Marvel, 1996 series) (October 1996)
- in Essential X-Men (Marvel, 1996 series) #6 ([August] 2005) [black and white]
- in X-Men: Mutant Massacre (Marvel, 2009 series) (2009)
- in New Mutants Classic (Marvel, 2006 series) #6 ([July] 2011)
- in X-Men: Mutant Massacre Omnibus (Marvel, 2018 series) (2018)
- in X-Men Milestones: Mutant Massacre (Marvel, 2019 series) (2019)
- in X-Men - La Collection Mutante (Hachette, 2020 series) #4 - Massacre mutant 1ère partie (novembre 2020)
- in New Mutants Omnibus (Marvel, 2020 series) #2 (2021)
A "Mutant Massacre" tie-in. The X-Men appear here between The Uncanny X-Men (Marvel, 1981 series) #211 and #212.
- Script
- ?
- Pencils
- Walter Simonson
- Inks
- Walter Simonson
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- X-Men; Thor; Power Pack
Checklist of the various titles involved in the cross-over event.