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Fantastic Four Annual #21 cover
Cover: Ron Frenz & Joe Sinnott

Fantastic Four Annual #21

Jul 1988 · Marvel · 1.75 USD; 2.25 CAD; 0.50 GBP
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In "Crystal Blue Persuasion!", the Inhumans descend on Earth with a urgent message: Quicksilver has returned, and Crystal must choose between her husband and her place among her people. Tensions rise as the Fantastic Four stand firm against the Inhumans' demands, while on the Moon, the High Evolutionary's Gatherers and Eliminators launch a stealthy assault on the Terrigen Mists. With Steve Englehart scripting the emotional stakes and Kieron Dwyer's dynamic interiors bringing the clash to life—enhanced by Joe Sinnott's inks and Wright's colors—this 1988 annual delivers a high-stakes standoff that tests loyalty, identity, and belonging. Ron Frenz's cover captures the moment of crisis, framing Crystal at the crossroads of two worlds.

Contains 3 stories
Crystal Blue Persuasion!
30 pp · Superhero
BurronFantomaskGatherers (villain)Eliminators (villain)Moloids (cameo flashback)

In "Crystal Blue Persuasion!", the Inhumans arrive on Earth to summon Crystal back to Attilan, urging her to reconcile with her husband Quicksilver—though she’s unsure if she’s ready to return. The Fantastic Four stand in their way, leading to a clash that forces both teams to unite when the High Evolutionary’s Gatherers and Eliminators attack the Moon, seeking the Terrigen Mists. With tensions high and loyalties tested, Crystal must choose where her heart truly lies.

Crystal
10 pp · Superhero
High Evolutionary Chapter Five: Silver and Crimson
6 pp · Superhero
Moloids (flashback)

ComicBooks.com Value

Our Model is In Beta
Raw (VF) $5
CGC 9.8 · 18 in census $68*
CGC 9.6 · 6 in census $31*
CGC 9.4 · 6 in census $30*
CGC 9.2 · 2 in census $30*
CGC 9.0 · 2 in census $30*
CGC 8.5 none in existence
Show all 13 grades
CGC 8.0 none in existence
CGC 7.5 · 3 in census $30*
CGC 7.0 none in existence
CGC 6.5 none in existence
CGC 6.0 none in existence
CGC 5.5 · 1 in census $30*
CGC 5.0 · 2 in census $30*
* estimate — limited direct-sales data at this grade
Our model’s value — refined as new sales data arrives · CGC census counts shown where available

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Cast · 40 characters

Full credits

artist, inker Joe Sinnott
colorist Wright
letterer Lopez
cover pencils Ron Frenz
cover inks Joe Sinnott

Reprints

Reprinted in Los 4 Fantásticos #73 (1988), Nova #146 (1990), Fantastici Quattro #82 (1992), Fantastici Quattro #83 (1992), Evolutionary War Omnibus #[nn] (2011), Fantastic Four Epic Collection #18 (2019), Die Fantastischen Vier #26

Key issues in Fantastic Four Annual

Variants (1)

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