Classic X-Men (1986) #15
A battle for the entire universe is underway! With Emperor D'Ken threatening to destroy the universe while trying to utilize the power of the M'Kraan Crystal, the X-Men and the Starjammers discover a horrible truth - when the specific stars come into alignment, the crystal will become available to D'Ken...and with it, the universe!
Published: 11/1/1987
- Arthur Adams, penciller (cover)
- Chris Claremont, writer