Uncanny X-Men (1963 1st Series) 41 CGC 9.0. First appearance of Grotesk. Cover pencils by Don Heck, inks by George Tuska. Now Strikes.the Sub-Human!, script by Roy Thomas, pencils by Don Heck, inks by George Tuska; the X-Men battle the Grotesk, the last survivor of the Sub-Humans. !