Fantastic Four#30

Fantastic Four #30

Sep 1964 · Marvel

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★ 1st appearance — Diablo

About this Issue

Fantastic Four #30 (September 1964) is the debut issue of Diablo — Esteban Corazón de Ablo — a millennium-old Spanish alchemist who bartered his soul to the demon Mephisto for near-immortality and who would go on to become one of the FF's most persistent recurring antagonists across six decades of Marvel continuity. The story stands out within the Lee–Kirby run for the emotional weight it places on the Thing: Ben Grimm is not defeated by brute force but by the very longing to be human again, making him a willing accomplice to a villain — a psychologically sophisticated turn that deepened the series' reputation for character-driven drama at a moment when most superhero comics still relied on straightforward good-versus-evil plotting. Set in Transylvania and steeped in Gothic atmosphere, the issue also demonstrates how confidently Lee and Kirby were expanding the FF's narrative geography beyond New York City, pulling in European folklore and horror-movie trappings to distinguish the book from its contemporaries.

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History

The issue carries a cover date of September 1964 and a release date of June 9, 1964, and was produced during the height of the Lee–Kirby partnership that had been powering the title since its 1961 launch. Stan Lee scripted and edited, Jack Kirby pencilled and drew the cover, Chic Stone inked (he was the series' regular inker for roughly a year around this period, and his finishes are closely associated with Kirby's work from this era), Stan Goldberg colored the cover, and Artie Simek lettered the interior. No unusual production circumstances have been documented for this specific issue beyond the standard Marvel 'Marvel Method' collaboration of the period.

Trivia · 11 facts

First appearance of Diablo (Esteban Corazón de Ablo), an immortal alchemist villain who debuted here and returned as a recurring Fantastic Four antagonist for decades.
Created by writer Stan Lee and penciller Jack Kirby, with inks by Chic Stone, colors by Stan Goldberg, and lettering by Artie Simek.
Cover date: September 1964; on-sale/release date: June 9, 1964 (confirmed via Library of Congress 1964 Periodicals records).
Story title: 'The Dreaded Diablo!' The 23-page tale is set in Transylvania, where the FF encounter Diablo's castle while on vacation, and the Thing unwittingly frees him from a century-long imprisonment.
Diablo's origin as later expanded in Marvel continuity: a 9th-century Saragossan court alchemist who sold his soul to Mephisto for an extended lifespan, was feared by Transylvanian villagers, and was sealed in a stone crypt roughly 100 years before the FF's visit.
The story's central dramatic hook exploits Ben Grimm's deepest vulnerability — his desire to regain human form — allowing Diablo to turn the Thing against his teammates by offering a partial transformation potion.
Diablo returned as early as Fantastic Four #35 and later appeared in Avengers #41–42, Fantastic Four #118, and numerous subsequent titles, establishing him as a durable Silver Age villain.
The issue has been reprinted internationally and domestically, including in Marvel Collectors' Item Classics #22 (August 1969), Los 4 Fantásticos (Mexico, La Prensa) #45, Los Cuatro Fantásticos (Novedades) #26, I Fantastici Quattro Gigante (Editoriale Corno) #17, Die Fantastischen Vier (BSV-Williams) #27, and most recently in Marvel Masterworks: The Fantastic Four Vol. 3, Third Edition (2024).
A British pence-copy variant of the issue also exists, as catalogued by the Grand Comics Database.
Diablo has been adapted into animation multiple times, including the 1967 Fantastic Four cartoon (voiced by Regis Cordic), Fantastic Four: World's Greatest Heroes (voiced by Trevor Devall), the 2005 Fantastic Four animated series (voiced by André Sogliuzzo), and Marvel Disk Wars: The Avengers (voiced by Matthew Mercer in the English dub).
Stan Lee later remarked in a 2013 interview with Chris Hardwick that Diablo was one of his creative regrets, saying he felt he never fully knew the character the way a creator should.