"House of M" is a Marvel Comics storyline that centers around the character Wanda Maximoff, also known as the Scarlet Witch. After experiencing immense grief over the loss of her children, Wanda uses her reality-altering powers to create an alternate universe where mutants are the dominant species, and her father, Magneto, rules as a king. This new reality drastically changes the lives of many characters in the Marvel Universe. The storyline explores themes of power, loss, and identity, as characters grapple with their new roles in this altered world. Key figures, including Spider-Man, Wolverine, and Professor X, must confront the consequences of Wanda's actions and seek to restore the original reality. The arc culminates in a significant event that reshapes the future of mutants in the Marvel Comics universe.