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Marvel Super-Heroes #21 cover
Cover: Marie Severin & John Romita

Marvel Super-Heroes #21

Jul 1969 · Marvel · 0.25 USD
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In "Sub-Mariner!", the Avengers grapple with guilt over the Hulk’s destructive path after he wanders off, leading them to track him down. Just as tensions flare and battle seems inevitable, the Sub-Mariner unexpectedly steps in—aligning with the Hulk in a moment that shifts the tide. Written by Stan Lee and brought to life with dynamic art by Jack Kirby, with inks by P. Reinman and lettering by S. Rosen, this 1969 issue features a striking cover by Marie Severin and John Romita.

Contains 2 stories
Sub-Mariner!
25 pp · Superhero
The Avengers [Thor [Don Blake]Giant-Man [Henry Pym]The Wasp [Janet Van Dyne]Iron Man [Tony Stark]]The Sub-MarinerHulk [Bruce Banner]Fantastic Four [The Thing [Ben Grimm]Mr. Fantastic [Reed Richards]The Invisible Girl [Sue Storm]The Human Torch [Johnny Storm]]Spider-Man [Peter Parker]The X-Men [Angel [Warren Worthington III]The Beast [Hank McCoy]Cyclops [Scott Summers]Iceman [Bobby Drake]Marvel Girl [Jean Grey]Professor X [Charles Xavier]]Rick JonesThe Teen BrigadeJane Foster

In this 1969 tale from *Marvel Super-Heroes* #21, the Avengers grapple with guilt over the Hulk’s destructive path after he departs from their ranks. Their search leads them to confront him—only for the Sub-Mariner to unexpectedly intervene, joining forces with the Hulk in a clash that reshapes the battlefield.

No One Can Stop the Vanisher!
22 pp · Superhero
The X-Men [Professor XThe AngelThe BeastCyclopsMarvel Girl [Jean Grey]Iceman]The Vanisher (first appearance)Special Agent Fred Duncan

In "No One Can Stop the Vanisher!", the X-Men face their newest threat: a teleporting mutant with no visible means of stopping, stealing top-secret military plans. As Iceman watches from the sidelines, tension simmers when he notices Marvel Girl’s focus shifting to Cyclops—just as the team prepares to confront a foe who vanishes before they can even react.

ComicBooks.com Value

Our Model is In Beta
Raw (VG) $11
CGC 9.8 · 2 in census $1,645*
CGC 9.6 · 7 in census $513*
CGC 9.4 · 9 in census $263*
CGC 9.2 · 6 in census $152*
CGC 9.0 · 5 in census $103*
CGC 8.5 · 5 in census $71*
Show all 15 grades
CGC 8.0 · 3 in census $55*
CGC 7.5 · 5 in census $43*
CGC 7.0 · 5 in census $36*
CGC 6.5 · 2 in census $30*
CGC 6.0 · 3 in census $30*
CGC 5.5 · 3 in census $30*
CGC 5.0 · 1 in census $30*
CGC 4.5 · 4 in census $30*
CGC 4.0 · 1 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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Full credits

writer Stan Lee
artist Jack Kirby
letterer S. Rosen
cover pencils Marie Severin
cover inks John Romita

Reprints

↩ Reprints The X-Men #2 (1963), The Avengers #3 (1964), The X-Men #6 (1964), The X-Men #8 (1964), The X-Men #9 (1965)

Reprinted in The Avengers Omnibus #1 (2011), Marvel Masterworks: The Avengers #1 [Fourth Edition] (2023), Marvel Origins #10 (2023), Marvel Origins #57 (2025)

Key issues in Marvel Super-Heroes

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