Marvel Masterworks: The Fantastic Four #10

When the Fantastic Four entrust their infant son to the care of the powerful sorceress Agatha Harkness, their temporary sanctuary is shattered by the sudden return of the Frightful Four—only to be effortlessly repelled by Agatha’s formidable magic. The story unfolds with the team’s protective instincts tested and the stakes raised in a battle where even the mightiest villains are no match for a witch of her caliber.

In "The Strength of the Sub-Mariner," Prince Namor of Atlantis saves the life of the mutant Magneto, only to find himself at odds with the man he rescued. When Magneto fails to sway Namor to his cause, he stirs chaos, pitting the Sub-Mariner against the Fantastic Four and forcing Atlantis to march on New York City.

In "At War with Atlantis," the Fantastic Four race to prevent a global conflict between the U.S. and Atlantis, only to uncover a shocking conspiracy orchestrated by Magneto. With Invisible Girl and Lady Dorma taken hostage, Magneto manipulates both sides into war, seizing control of the Atlantean army and launching an invasion of New York.

In "Our World... Enslaved!", Magneto, leading the Atlantean army, seizes New York City and takes Sue Storm and Lady Dorma hostage, forcing Namor and the Fantastic Four to choose allegiance or destruction. With a daring plan forged by Mr. Fantastic, the heroes turn the tide using a weapon that harnesses Magneto’s own powers against him.