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Thor #300 cover
Cover: Keith Pollard

Thor #300

Oct 1980 · Marvel · 0.75 USD
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About this Issue

Thor #300 serves as the thunderous climax of the Eternals Saga — a multi-year storyline that formally wove Jack Kirby's Eternals mythology into the bedrock of the Thor title and, by extension, the wider Marvel Universe. The issue delivers two seismic revelations that permanently reshaped Thor's mythology: the in-universe origin of the Destroyer armor (revealed to have been forged from a portion of every skyfather's power as a secret weapon against the Celestials) and the disclosure that Gaea, the Earth-mother, is Thor's biological mother — making the Thunder God literally a child of two worlds. As the first team appearance of the Council of Godheads — a pantheon-spanning assembly representing virtually every major mythological tradition in the Marvel cosmos — the issue also laid the institutional groundwork for decades of subsequent crossover storytelling involving gods, cosmic judgment, and Earth's place in the universe.

In "Chapter One Twilight of the Gods!", Thor #300 marks a pivotal moment in the series as the mythic Siegfried—killed by Hagen—is reborn in Asgard, renamed Thor, and restored to life by Odin himself. With the arrival of the first Celestial spaceship, Odin's despair gives way to renewed purpose, setting the stage for a cosmic turning point. Written by Mark Gruenwald and Ralph Macchio, and brought to life by Keith Pollard’s dynamic art and Gene Day’s inks, this landmark issue blends Norse legend with cosmic scale, all rendered in vivid color by Carl Gafford and lettered by Joe Rosen, with a striking cover by Keith Pollard.

Contains 3 stories
Chapter One Twilight of the Gods!
11 pp · Superhero
Eye of OdinRhine-Maidens (flashback)Gunther (flashback)Hagen (flashback)Gutruna (flashback)Valkyrie [Valtrauta] (flashback)Valkyrie [Grimgerda] (flashback)Mimir (flashback)
Chapter 2 Whatever Gods There Be...
12 pp · Superhero
Eye of OdinMimir

In "Chapter 2 Whatever Gods There Be..." from Thor #300, the Eye of Odin recounts a forgotten clash between the old gods—Odin, Zeus, and Vishnu—and the Celestials, a battle that ended in defeat. Now, in the present, Thor learns that Odin has taken up the Destroyer armor to face the Celestials once more, turning myth into desperate action.

Chapter Three Day of Alpha
14 pp · Superhero
ThorOdinDestroyerCelestials [Hargen the MeasurerTefral the SurveyorNezarr the CalculatorGammenon the GathererArishem the JudgeJemiah the AnalyzerEson the SercherOneg the ProberZiran the Tester]Eternals [Uni-Mind]Zeus (cameo)Vishnu (cameo)Mother Earth

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History

The issue is the nineteenth chapter of a twenty-part Eternals Saga arc that began under writer Roy Thomas, who conceived an ambitious crossover between the Asgardian corner of Marvel and Kirby's Eternals concepts; Thomas departed the title before the arc concluded, leaving writers Mark Gruenwald and Ralph Macchio to land the plane. The creative team for this oversized milestone comprised penciler Keith Pollard on breakdowns, with Gene Day handling finished art and inks, Carl Gafford on colors, Joe Rosen on letters, and Jim Salicrup as editor under editor-in-chief Jim Shooter. Published in October 1980, the issue ran 52 pages — roughly double the standard page count — befitting its anniversary and climactic status.

Trivia · 8 facts

  • Part 19 of the 20-part Eternals Saga arc; published October 1980 as a double-sized 52-page milestone anniversary issue.
  • Written by Mark Gruenwald and Ralph Macchio, with pencil breakdowns by Keith Pollard and finished art/inks by Gene Day; edited by Jim Salicrup under EIC Jim Shooter.
  • First team appearance of the Council of Godheads, an assembly of sky-father deities from across Earth's pantheons including Zeus, Vishnu, Odin, Ammon Ra, Anu, Buddha, Itzamna, Izanagi, Manitou, Nuada, Buluku, Ulgen, Ukko, Tezcatlipoca, Tomazooma, Viracocha, and Okonorote, among others.
  • First appearance of Yu Huang, the Jade Emperor, and a cameo first appearance of Kiana (later known as Moonstalker).
  • First full appearance of the Young Gods as a team, the hand-selected human representatives presented by Gaea to Arishem the Judge; their presentation saves Earth from Celestial destruction.
  • Origin of both Odin and Thor is revealed: Siegfried and Brunnhilda are restored to life by Odin with their mortal memories erased, with Siegfried reborn as Thor; the origin of the Destroyer armor is also established here — Odin had it built and charged with the combined life-force of every Asgardian and a portion of power from each skyfather as a last-ditch weapon against the Celestials.
  • Gaea is formally revealed as Thor's biological mother, a cornerstone piece of his mythology that has informed Thor storytelling ever since.
  • The issue has been reprinted multiple times, including in Thor #450 (1992), the two-volume Thor: The Eternals Saga (2006–2007), Thor and the Eternals: The Celestials Saga (2020), and Thor Epic Collection Vol. 10: The Eternals Saga (2024).

Cast · 15 characters

Full credits

artist, inker Gene Day
colorist Carl Gafford
letterer Joe Rosen
cover pencils, inks Keith Pollard

Reprints

Reprinted in Thor #450 (1992), Thor: The Eternals Saga #2 (2007), Marvel Masterworks: The Mighty Thor #19 (2019), Thor and the Eternals: The Celestials Saga #[nn] (2020), Thor Epic Collection #10 (2024), Biblioteca Marvel: Thor #30

Key issues in Thor

Variants (1)

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