- Chris Claremont
- John Byrne
- Terry Austin
- Andy Yanchus
- Tom Orzechowski (pp. 1–14, 16, 23); Denise Wohl (pp. 15, 17, 22, 26–31)
- X-Men [Professor X; Cyclops; Phoenix [Jean Grey]; Storm; Wolverine; Colossus; Banshee; Nightcrawler]; GUESTS: Lilandra; Misty Knight; Peter Corbeau; Starjammers [Corsair [Christopher Summers]; Hepzibah; Raza; Ch'od]; VILLAINS: Jahf (1st); Modt (1st); D'Ken; CAMEOS: Gladiator; Titan; Jimmy Carter; Mr. Fantastic; Human Torch; The Thing; Firelord; John Grey; Elaine Grey; Avengers [Captain America [Steve Rogers]; Beast; Wasp; Yellowjacket [Hank Pym]; Black Panther]; CAMEO FLASHBACK: Kate Summers
- The X-Men and Starjammers are forced to battle the Crystal Guardians to try and gain access to the M'Kraan Crystal. Jean manifests awesome power as the Phoenix and saves the universe from destruction. Corsair is revealed as Cyclops' father.
1st Byrne and Austin issue of X-Men.
Sources for particularization of letters credits are The Marvel Comics Index (Olshevsky 1981) and The Official Marvel Index to the X-Men (Olshevsky 1988).