Uncanny X-Men Vol.1 #97
Cyclops and the all new X-Men suddenly find themselves facing off with former allies Havok and Polaris. Who is the mysterious villain that plots and schemes from the shadows? Who is this man that pits brother against brother? Plus, what do Charles Xavier's recurring prophetic nightmares mean for the future of his students?
Printed: Nov 1975
Writers: Chris Claremont
Art: Dave Cockrum and Sam Grainger
Cover: Dave Cockrum