X-Men #125 – 1st Appearance of Proteus / Return of Phoenix – CGC 9.4 – 1979 (Marvel Comics)

📌 CGC 9.4 with white pages. Bright, clean, and well-centered Direct Edition copy with strong gloss and sharp edges—excellent preservation for a major X-Men key issue from the Claremont/Byrne era.

📖 Comic Details:
In “There's Something Awful on Muir Island!”, the X-Men face the terrifying emergence of Mutant X (Proteus)—a powerful reality-warping mutant and the son of Moira MacTaggert. Meanwhile, Jean Grey returns as Phoenix, setting the stage for one of Marvel’s most acclaimed story arcs.

🖌 Stories & Credits:
Written by Chris Claremont
Art by John Byrne
Inks by Terry Austin
Cover Art by John Byrne and Terry Austin
Published: September 1979
Publisher: Marvel Comics
Edition: Direct Edition
Cover Price: $0.40
CGC Label #: 4369084006
Comes encased and certified by CGC

✨ Key Features / Reason to Buy:

• 1st appearance of Proteus (Mutant X)

• Return of Phoenix (Jean Grey)

• Key chapter in the Claremont / Byrne X-Men run

• Classic late Bronze Age issue connecting to the Dark Phoenix Saga

• High-grade copy with white pages

💎 Collectible Appeal:
A defining Bronze Age X-Men key, introducing one of the team’s most powerful foes and marking a pivotal moment in Jean Grey’s transformation arc. Highly desirable in CGC 9.4 for both historical and investment value.