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Sub-Mariner #21 cover
Cover: Marie Severin & Johnny Craig

Sub-Mariner #21

Jan 1970 · Marvel · 0.15 USD
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“Invasion from the Ocean Floor!”

"Invasion from the Ocean Floor!" sees Namor caught in a deadly crossfire as Lady Dorma orchestrates an Atlantean assault on New York City to free him from a city-wide dragnet. With the Sub-Mariner pleading for peace, Lord Seth unleashes three colossal turtle monsters using the fabled Proteus Horn, forcing Namor to battle both the beasts and the escalating conflict. Written by Roy Thomas and brought to life with dynamic art by Marie Severin and Johnny Craig, this 1970 Marvel classic features a cover by Severin and Craig, capturing the scale and urgency of the underwater war.

writer Roy Thomas · artist, colorist Marie Severin · inker Johnny Craig · letterer Artie Simek · cover Marie Severin, Johnny Craig

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Full credits

writer Roy Thomas
artist, colorist Marie Severin
letterer Artie Simek
cover pencils Marie Severin
cover inks Johnny Craig

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

With a city wide dragnet being used to capture the Sub-Mariner, Lady Dorma decides to send the Atlantean army to attack New York City to rescue Namor. Namor tries to alleviate the situation, but Lord Seth uses the Proteus Horn to call forth three giant turtle monsters to attack. Namor tries desperately to fight the monsters off and convince everyone that war is not the answer. Realizing this, Seth then uses to horn to call off the giant turtles but gets killed when he inadvertently gets buried by an undersea quake alongside the monsters.

Plot details indexed by the Grand Comics Database (CC BY-SA).

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