Posted December 4-11, 2011 | Updated March 19, 2013 | April 2, 2013 | August 22, 2015
X-Men 20

With issue number 20 Stan Lee is getting ready to leave the X-Men, leaving the team in the equally legendary hands of Roy Thomas. Werner Roth still on pencils.
Here we see the criminal alliance of the Blob and Unus.

Mind you, this is one of the great friendships of the Marvel Universe. Many, many years from hence the Blob will mourn the death of his friend Unus in the pages of Spectacular Spider-Man.
Issue 20 also marks the return of the alien Lucifer. Lee gave this guy a big buildup but he will quickly be forgotten, one of the failed villains of the early X-Men years.