Uncanny X-Men Vol.1 #127
Wolverine's encounter with Proteus has left the feral mutant uncharacteristically shaken. Cyclops is forced to take drastic measures to rally his troops for the final showdown with Mutant X.
Printed: Nov 1979
Writers: Chris Clairemont and John Byrne
Art: John Byrne and Terry Austin
Cover: John Byrne and Terry Austin