Collects New Mutants (1983) #26-28, 44; Uncanny X-Men (1981) #253-255, 278-280; X-Factor (1986) #69-70.
David Haller is no ordinary mutant. Son of Charles Xavier, founder of the X-Men, David’s incredible mental powers fractured his mind — and now, each of his personalities controls a different ability! And they’re not all friendly, as Xavier and the New Mutants find out the hard way! But