His story sees him discovering that he and the magical teen hero Wiccan are in fact long-lost twin brothers, and that the pair are the reincarnations of the illusory sons of the Scarlet Witch and her former husband Vision.

Tommy is the reincarnation of Thomas Maximoff, a character created by Steve Englehart and Richard Howell who first appeared in The Vision and the Scarlet Witch #12 (September 1986).

An illusory Tommy appeared in the Marvel Cinematic Universe (MCU) Disney+ miniseries WandaVision (2021) played by Gavin Borders and Jett Klyne.

Thomas and William were twins, with Tommy being the older of the two, Thomas and William supposedly born to Scarlet Witch and Vision; in reality, Scarlet Witch used her reality warping powers to create twin sons, unknowingly, from two of five scattered fragments of the soul of the demon Mephisto that were previously lost to him in an ill-fated encounter with the powerful mutant child Franklin Richards.

[volume & issue needed] Vision states that Tommy is being held at the facility, presumably under court order, because he "accidentally" vaporized his school.

When they release him from his cell, it is immediately noted that Tommy, a white-haired speedster, bears a striking resemblance to Billy ("twin-like") and Quicksilver, sharing the latter's hair color and similar abilities.

Tommy cynically and cruelly begins attacking the officers and fleeing doctors, stating that he had been locked up for months and that during his time there, he was tested and experimented on with the goal to make him into a living weapon.

[6] When the Young Avengers confront the group of teenagers that have been using their name, Tommy immediately recognizes the member Coat of Arms (Lisa Molinari).

He eventually meets and befriends Prodigy, a former member of the New X-Men, and partners with the boy to catch a mysterious entity dressed as Patriot.

Writer Allan Heinberg stated of the situation, "According to Billy's theory, the souls of Wanda's twins inhabited his and Tommy's bodies when they were dispersed from Mephisto.

[21] Indeed, the Young Avengers Present issue from March 2008 has been solicited as involving "twin brothers" Wiccan and Speed looking for their "mother Wanda".

However, in Young Avengers Presents #3, where Speed and Wiccan search for the Scarlet Witch, Tommy's skepticism appears to have entirely diminished.

As they begin their search, Magneto arrives, having noticed the twins and their similarities to Wanda and Pietro, stating that he wants Wiccan and Speed to finally know him as their grandfather.

However, seeing as they are already teenagers, Wanda doesn't know if they were normal kids before her sons' souls took over their bodies (effectively killing whoever they were before) or whether the spirits went back in time to be born and raised by different parents.

During the Civil War: Young Avengers and Runaways crossover, when both teams invaded the Cube in order to save their friends, Speed is shown exploding a gun in his hand by using his hyperkinetic vibrations.

"[27] Alex Schlesinger of Screen Rant wrote, "Speed sits at a unique intersection where Young Avengers fans feel they know Tommy and have witnessed his growth, and yet have incredibly few stories where he's a central character.

The hero Speed, son of the Scarlet Witch, has not been utilized enough in Marvel Comics, but hopefully the future will give Tommy the spotlight as the leader of the Young Avengers.

As a child, Tommy witnessed the accidental murder of his mother by his uncle, Quicksilver, which caused their father, the Vision to become emotionless and withdrawn.

Tommy decided to assist the Avengers and tried to reach and recruit the Vision, who had become near-catatonic and enormous having apathetically allowed his molecules to diffuse, but to no avail.

Unlike his Earth-616 counterpart, Tommy Maximoff inherited his mystical abilities from his mother the Scarlet Witch rather than his uncle's super speed.

As a student of Doctor Strange, Tommy was able to perform various magical feats, including concussive mystical bolts and creating force fields.

[35] Several versions of Thomas "Tommy" Maximoff appear in live-action media set in the Marvel Cinematic Universe, portrayed by Gavin Borders as a five-year old and Jett Klyne as a ten-year old.