New Mutants #12.  Chris Claremont story, beautiful Tom Mandrake cover, Sal Buscema art.   This book is graded 9.6 NM+ with white pages by CGC.  This book happens to be a pedigree specimen from the Winnipeg Collection.   

Surprisingly, this book is rare!  There are only 30 copies graded 9.8, and only 10 graded 9.6 in CGC's census!