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Roy Thomas

Alter Ego Sep 1964

Alter Ego #7

Alter Ego #7
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Unofficial cover appearance of Black Adam and the Marvel Family with a text article about the characters’ history by Roy Thomas, one year prior to his first published comic written for Marvel
eBay listings refer to this issue as Black Adam's first appearance since the Golden Age but this publication was a fan-made magazine (fanzine)
Marvel Dec 1965

Modeling with Millie #44

Modeling with Millie #44
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First written work in the comic book industry by Roy Thomas
Roy Thomas was one of the chief architects at Marvel introducing Conan the Barbarian into comics, serving as Editor-in-Chief after Stan Lee and contributing to the Avengers, X-Men, Thor and others over the course of decades
Marvel Oct 1966

Uncanny X-Men #25

Uncanny X-Men #25
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1st cameo appearance of Kukulkan, a Mayan god
1st appearance and origin of El Tigre, a treasure hunter who was mutated by the Mystic Mists of the Savage Land which led to his suicide
Marvel Oct 1966

Uncanny X-Men #27

Uncanny X-Men #27
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First meeting of Spider-Man and the X-Men
Mimic joins the X-Men becoming the first member to join the team outside of the original lineup, but departs shortly afterward in X-Men #29
Marvel Apr 1967

Uncanny X-Men #31

Uncanny X-Men #31
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1st appearance of Cobalt Man, a former Stark employee who duplicated Iron Man tech for his own armor
1st appearance of Candy Southern, former girlfriend of Angel
Marvel Jun 1967

Uncanny X-Men #33

Uncanny X-Men #33
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$40
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$450
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Cover art featuring the Juggernaut
Original cover art featured Xorak the Outcast but was deemed too terrifying in accordance with the Comics Code Authority

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