A Second Slaughter

And yet, Genosha would play the stage to massacre of a different kind shortly after. Whisked away to the island nation by Magneto in a state of breakdown, Wanda Maximoff, the Scarlet Witch, used her out-of-control reality-warping powers to create the alternate reality known as the House of M. Here, a version of Genosha thrived under the royal rule of Magneto and his children, overseeing a world where mutants were ascendant over humankind.
When conventional reality was restored, robbing Wanda of her dream and safety, it was from Genosha, and in its ashes, that she spoke the fateful words that would spark the Decimation: “No More Mutants.” In an instant, Wanda warped reality once more, leaving all but a few hundred mutants without their powers—reducing the global mutant population by almost a million, between depowering and deaths caused by the loss of powers.