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Nowadays, centennial issues are something of anachronism, especially with the way that Marvel constantly reboots series (strangely enough, the publisher is still obsessed with matching DC’s big numbers, but more on how they do that). However, once upon a time, centennial issues were a huge deal, introducing new ideas, creators, and more. These ten X-Men centennial issues are the most important, each of them changing the team in various ways.
10) Uncanny X-Men #600

After the tumults of Avengers vs. X-Men, Brian Michael Bendis moved from the Avengers books to the X-Men books, writing All-New X-Men and Uncanny X-Men. Uncanny starred Cyclops, Emma Frost, Magneto, and Magik teaching a new generation of mutants to be revolutionaries, and it is one of the most maligned X-runs ever. Bendis didn’t do a great job with the team, and his run ended with Uncanny X-Men #600. This issue ended the “revolutionary Cyclops” plot, and led into post-Secret Wars era. It’s… fine, as far as quality, and it’s only important because it ended the blah Bendis run.
9) Uncanny X-Men #400

Uncanny X-Men #400 is almost completely forgotten, and a big reason for that is how unimportant it is. At the time of the issue’s release, Uncanny was the least popular X-title, with Ultimate X-Men (Vol. 1) and New X-Men tearing up the sales charts. Joe Casey was writing Uncanny, and while it was good, he was out of his element. This issue was the final part of the Church of Humanity story that Casey had been writing, and that’s pretty much all it is. It’s a fine story, but it’s not exactly important.
8) X-Men #300

X-Men (Vol. 2) became X-Men: Legacy and contains the second longest run in X-history, with writer Mike Carey writing the book for almost a decade. Simon Spurrier would relaunch X-Men: Legacy but Carey would return for what would have been X-Men (Vol. 2) #300. As far as it goes, this book isn’t super important on its own. It’s the grand finale of a period of X-books that lasted years, though, and is honestly a pretty good read when it comes right down to it.
7) Uncanny X-Men #300

Uncanny X-Men #300 came out in 1993, at the height of the X-Men’s powers. The issue pit the X-Men against the new Acolytes, Magneto’s servants. This story plays a key role in the build-up to one of the most important X-stories of the early ’90s, “Fatal Attractions”. This holofoil emblazoned book was a great read. It introduced readers to a cool new villains (the last group of Acolytes had been killed in X-Men (Vol. 2) #3, so the ones in this issue are all brand-spanking new) and put the group on the road to one of their most important moments. ’90s X-Men comics were something else, and this was a fine example of everything they did well.
6) X-Men (Vol. 2) #100

Chris Claremont is the longest tenured X-Men writer, writing Uncanny X-Men and various other mutants books from 1974 to 1991. He made the team successful, and the ’90s were basically numerous writers trying to do Claremont-style stories, while also paying off plots he left dangling when he left. Sales fell over the decade, and it was announced that Claremont would return to the team with X-Men (Vol. 2) #100. This issue introduced the Neo, the villains of his second run, and is honestly a pretty good comic. However, a lot of fans didn’t like this second run very much, so most people will tell you that it’s bad.













