The Avengers #10
The Avengers #10 holds a firm place in Silver Age history as the debut of Immortus — a time-manipulating lord of Limbo who would later be revealed as a far-future incarnation of Kang the Conqueror and Rama-Tut, making this issue a foundational piece of Marvel's entire time-travel mythology. Beyond that single introduction, the issue contains what every major source identifies as the first utterance of the battle cry 'Avengers Assemble!', delivered by Thor after breaking free of a petrification trap — a phrase that has since become the team's defining rallying call across decades of comics, animation, and film. The story also marks the first recorded demonstration that Captain America's shield can withstand a direct blow from Mjolnir, a fact that resonated through the Marvel continuity long after. Taken together, those three firsts make this an unexpectedly dense key issue for a mid-run chapter of the earliest Avengers era.
In "The Avengers Break Up!", the team faces their greatest internal crisis yet as Immortus, a master of time and Limbo, manipulates events from beyond the veil, rallying ancient forces to challenge the Avengers. Written by Stan Lee and drawn by Don Heck with inks by Dick Ayers, this pivotal 1964 issue sees the heroes' unity tested like never before. The cover by Jack Kirby and Chic Stone captures the tension with a dramatic, otherworldly flair.
Sell my copy
Have this issue — or a whole collection? Get a fair offer from us, skip the marketplace fees and the hassle.
We Buy Collections ▸History
With Jack Kirby having penciled the series through issue #8, Don Heck took on interior art duties beginning with issue #9, and this issue continues that transition — Heck handling pencils with Dick Ayers inking, while Kirby still provided the cover (with inks by Chic Stone). Stan Lee scripted under his own editorship, with Martin Goodman credited as publisher. The issue went on sale September 8, 1964, carrying a November 1964 cover date and a twelve-cent cover price, produced by Eastern Color Printing in Waterbury, Connecticut. The editorial context is one of rapid experimentation: Marvel had introduced Kang just two issues prior in #8, and Lee wasted no time adding yet another temporal variant to the mythology, signaling that time travel would be a recurring structural pillar of the Avengers' world.
Trivia · 7 facts
- First appearance of Immortus (Nathaniel Richards), created by Stan Lee and Jack Kirby, in the story 'The Avengers Break Up!' (interior art by Don Heck, inks by Dick Ayers).
- First use of the battle cry 'Avengers Assemble!' in any Marvel comic — shouted by Thor after breaking free of a stone-flesh trap during the climactic fight with the Masters of Evil.
- First comic to depict Captain America's shield withstanding a blow from Thor's hammer Mjolnir.
- Immortus allies with the original Masters of Evil (Baron Heinrich Zemo, Enchantress/Amora, and Executioner/Skurge) to divide and destroy the Avengers by pitting each member against a figure drawn from history or legend (Goliath, Merlin, Hercules); those figures were later retconned in Avengers Forever #8 as Space Phantoms in disguise.
- Immortus was retroactively established as a future identity of Kang the Conqueror in Giant-Size Avengers #3 (February 1975), deepening the issue's continuity significance a decade after its publication.
- The story was reprinted in Marvel Triple Action #5 (September 1972) and has since appeared in Marvel Masterworks: The Avengers Vol. 1, Mighty Marvel Masterworks: The Avengers #1 (2021), and various international editions including the UK's Terrific! (1967) and the Mexican Los Vengadores (1966).
- The issue includes a one-page Captain America pin-up drawn by Jack Kirby (inks: Sol Brodsky), separate from the main story, and contains a letter-column entry from future comics artist Gene Day.
Cast · 24 characters
Full credits
Full plot ⚠ may contain spoilers
▸ Reveal full plot — may contain spoilers
Immortus appears before the Masters of Evil and demands to join them against the Avengers, using his control of the realm of Limbo to summon other powerful people from past ages to help them.
Plot details indexed by the Grand Comics Database (CC BY-SA).