Scarlet Witch

Scarlet Witch is a superheroine published by Marvel Comics. Created by Stan Lee and Jack Kirby, Scarlet Witch first appeared in The X-Men #4 (March 1964). Originally stated to have the ability to alter probability, her powers and abilities have grown since her Silver Age debut to be one of the Marvel Universe's most powerful reality warpers. Wanda Maximoff and her twin brother Quicksilver (real name Pietro Maximoff) originally debuted as members of the Brotherhood of Evil Mutants, before switching sides to the Avengers a year after their debut, and has since remained a member of the Avengers, the West Coast Avengers and Force Works. She later married her android teammate Vision and borrowed magical forces to make herself pregnant, resulting in twin sons Billy and Thomas. Thomas and Billy were later revealed to be created from scattered pieces of the demon lord Mephisto and the two were seemingly erased from existence, though they would later reappear as the heroes called Wiccan and Speed. Scarlet Witch's mind was erased, causing a mental shock to Mephisto that enables his defeat. Vision's emotions being erased led to the annulment of their marriage. Wanda's memories of her children came flooding back when she heard the Wasp reference them, and launched an attack against the Avengers under the influence of Doctor Doom. As a result, the Vision, Scott Lang, and Hawkeye were all killed and the team was disbanded. Her brother Pietro, learning that the Avengers and the X-Men were contemplating killing his sister, convinced Wanda to remake reality into a world where everyone has their heart's desire fulfilled. In this world, the two of them and Magneto rule over a world where mutants are not persecuted but are the dominant species. Magneto realizes he is trapped in a fake reality created by Wanda and, after he learned that Pietro is to blame, killed him in anger. Wanda promptly resurrects her brother and angrily declared "No more mutants." This would trigger what would be referred to as "M-Day," in which the majority of Earth's mutant population, including Magneto and Quicksilver, loses their X-gene and powers (though each later has their powers restored). Wanda took refuge in Transia, and after the revelation that most of her actions were caused or influenced by Doctor Doom and reuniting with her two children, returned to the Avengers.