Incredible Hulk #336 (Marvel, 1987 — Cover A)Marvel Comics · Incredible Hulk (1962-1999) · 23 pages · Published 1987-10-01Peter David — WriterTodd McFarlane — ArtistSteve Geiger — Cover ArtistHulk comes into conflict with the heroic mutants of X-Factor! Will Marvel's Merry Mutants prevail? And why is Hulk... gray?Buy or read this issue on NeonIchiban