File:X-Men Vol 1 4 001.jpg

Description
As the X-Men practice in their Danger Room, they are unaware of another gathering of mutants on an uncharted Atlantic island: Magneto's Brotherhood of Evil Mutants, which includes the leaping Toad, the illusionist Mastermind, the speedster Quicksilver, and the hex-casting Scarlet Witch. Although mutually distrustful, the members are united by their fear of Magneto, whom Quicksilver and his sister serve only because he once saved the girl from villagers who accused her of witchcraft. Appropriating a convoy freighter, Magneto and the Brotherhood take over the Central American nation of San Marco. The X-Men enter San Marco in their civilian identities, then attack Magneto's fortress, where they battle their arch-foe's new team. When Prof. X enters the fray, Magneto orders his forces to retreat, while setting two booby-traps — a conventional explosive to destroy the X-Men, and as a back-up, a nuclear bomb which will annihilate all of San Marco. The professor saves the X-Men from the first bomb, but seemingly loses his mental powers as a result of its explosion. Unable to go through with Magneto's scheme, Quicksilver doubles back and defuses the nuclear weapon, as the Brotherhood escapes.