Uncanny X-Men  (1963)

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Canadian Edition ⋅ Marvel ⋅ 1986

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Non-Key Issue. No additional information is available.
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First mention of the term Omega when referring to the power class of a mutant

Marvel ⋅ 1986

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Non-Key Issue. No additional information is available.
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1st cameo team appearance of The Marauders: Arclight, Harpoon, Riptide, Vertigo, Scalphunter and Scrambler

This cover was later reprinted for a trade paperback collection but digitally augmented to remove the cigar that Wolverine was smoking

📖 Reading Order: Mutant Massacre Prologue 1

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1st full team appearance of The Marauders: Arclight, Riptide, Vertigo, Harpoon, Scalphunter, Scrambler

Specialty border printed on select covers published in November 1986 celebrating Marvel's 25th Anniversary or more precisely, the 25th year since Fantastic Four #1 was published in November 1961

📖 Reading Order: Mutant Massacre Part 1

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First battle of Wolverine versus Sabretooth

📖 Reading Order: Mutant Massacre Part 6

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Betsy Braddock joins the X-Men and adopts the name Psylocke

1st cameo appearance of Mr. Sinister

📖 Reading Order: Mutant Massacre Part 9

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Dazzler joins the X-Men

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1st appearance of Stonewall, Super Sabre and Crimson Commando - a team of Cold War veterans turned vigilantes

Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.

Newsstand ⋅ Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.
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Havok joins The X-Men

Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.
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1st full appearance of Mr. Sinister

[July 2022 - Javier Bardem rumored to be cast as Mr. Sinister in an unknown MCU project]

Newsstand ⋅ Marvel ⋅ 1987

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1st full appearance of Mr. Sinister

Reprint ⋅ Marvel ⋅ 1987

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'So Much Fun' variant

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Classic battle of the X-Men versus the Marauders

Newsstand ⋅ Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1987

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.
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1st full appearance of the Adversary, reveals its true form

Newsstand ⋅ Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.
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1st team appearance of The Reavers: Pretty Boy, Bonebreaker, Skullbuster

1st appearance of Tyger Tiger, a crimelord in Madripoor

1st appearance of Gateway

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Newsstand ⋅ Marvel ⋅ 1988

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Debut of Madelyne Pryor in Goblin Queen costume

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1st appearance of Genosha

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1st appearance of the Genegineer

Marvel ⋅ 1988

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1988

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1st cover and 2nd appearance of Mr. Sinister

1st cover appearance and mention of Madelyne Pryor as the Goblin Queen

📖 Inferno Crossover: Prologue begins, then read X-Factor #33 - #35

Marvel ⋅ 1989

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📖 Inferno Crossover: next, read Power Pack #42

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Origin of Madelyne Pryor as the Goblin Queen

📖 Inferno Crossover: next, read New Mutants #73

Newsstand ⋅ Marvel ⋅ 1989

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Non-Key Issue. No additional information is available.

Mark Jewelers ⋅ Marvel ⋅ 1989

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Non-Key Issue. No additional information is available.

Marvel ⋅ 1989

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📖 Inferno Crossover: next, read X-Factor #38

Marvel ⋅ 1989

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📖 Inferno Crossover: next, read X-Factor #39

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1st appearance of Jubilee, a Chinese-American teenager with the ability to emit fireworks from her fingers

Newsstand ⋅ Marvel ⋅ 1989

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Non-Key Issue. No additional information is available.

1:25 ⋅ Marvel ⋅ 2024

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Non-Key Issue. No additional information is available.

Facsimile ⋅ Marvel ⋅ 2024

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Parody issue of DC's 'Invasion' limited series

Cameo appearance of Chewbacca, Yoda, Jabba the Hut, Boba Fett, an Alien Xenomorph, E.T. and Alf

Jean Grey appears full-frontal nude in this issue but it is at a slight distance so that specific detail is absent

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