From Giant-Size X-Men #1 through the modern era — the arcs that define mutantkind. Verified against Comic Book Herald, Marvel.com, and Marvel Database.
First appearances of Storm, Colossus, and Nightcrawler. Earliest catalogued appearances of Magik, Thunderbird (John Proudstar), and Krakoa.
Introduces the All-New, All-Different team — Storm, Wolverine, Colossus, Nightcrawler — relaunching the franchise after a 5-year hiatus.
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Earliest catalogued appearances of Scalphunter (Marvel), Arclight, Harpoon, and 2 more.
The Marauders slaughter the Morlocks in the first major X-Men crossover. Permanently injures several X-Men and marks a shift to a darker era.
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The X-Men sacrifice their lives on live television, then are secretly resurrected. The team goes underground.
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Earliest catalogued appearances of Cassandra Nova and The Wild Sentinel.
Morrison reinvents the X-Men for the 21st century — Cassandra Nova, Genosha destroyed, Emma Frost joins the team.
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Earliest catalogued appearance of Negasonic Teenage Warhead.
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Earliest catalogued appearances of Glob Herman, Beak, and Mammomax.
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Earliest catalogued appearances of Phoebe Cuckoo, Mindee Cuckoo, Celeste Cuckoo, and 5 more.
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Earliest catalogued appearances of Xorn and Phaser.
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Earliest catalogued appearances of Skybolt and Longstrike.
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Earliest catalogued appearance of Fantomex.
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Earliest catalogued appearance of E.V.A.
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Earliest catalogued appearance of Dust (Qadir).
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Earliest catalogued appearance of Quentin Quire.
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Earliest catalogued appearances of Ernst and Basilisk.
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Earliest catalogued appearance of Christian Frost.
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Earliest catalogued appearance of Ultimaton.
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Earliest catalogued appearance of Criti Noll.
Scarlet Witch utters "No more mutants," reducing the mutant population to 198. The most consequential X-Men event of the 2000s.
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Earliest catalogued appearance of Layla Miller.
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