Uncanny X-Men Vol.1 #138
In the tragic aftermath of last issue's stunning events, the X-Men bury one of their own. Scott relives the history of X-Men and reflects. Overcome with grief, Cyclops decides to leave the X-Men. The team is forced to push on without their heart, Jean Grey, and their soul, Scott Summers. As one member leaves a new member shows up.
Printed: Oct 1980
Writers: Chris Claremont and John Byrne
Art: John Byrne and Terry Austin
Cover: John Byrne and Terry Austin