[1] Once a chemical engineer who longed to get rich, Mark Raxton was caught in an accident that saw his body get covered by an experimental organic-liquid metal alloy, which granted him superpowers, including the ability to generate extreme heat and radiation.

Additionally, an illusionary creature based on Molten Man appears in the Marvel Cinematic Universe film Spider-Man: Far From Home.

He was a scientist who could not wait to use his skills to become rich and once worked at Oscorp Industries as the laboratory assistant to Spencer Smythe, creator of the Spider-Slayers.

[3] Fearing for his life, Raxton ran for the nearest hospital, only to discover that the alloy had changed him for the better when he angrily punched an irate motorist's hood, buckling it.

Realizing the great potential his new abilities afforded him, Raxton, calling himself the Molten Man, turned to crime to further his monetary gains.

Peter Parker, as Spider-Man, nearly missed his high school graduation to stop Molten Man's first crime spree.

[5] In his third encounter with Spider-Man, it was revealed that Peter's friend Liz Allan was Raxton's stepsister, and the Molten Man's metallic skin had begun to give off intense heat and consume itself.

[volume & issue needed] In the months following the Clone Saga, Raxton was abducted by Norman Osborn, the Green Goblin, and brainwashed.

Under mind control, the Molten Man attacked and killed Osborn's henchman Alison Mongraine, the only person who knew of the location of Peter and Mary Jane's baby.

The Molten Man uses his brawn and brains to help Spider-Man and the Daily Bugle reporter Ben Urich uncover what happened.

[volume & issue needed] During the Civil War storyline, the Molten Man and the Scarecrow were used as bait for Captain America's Secret Avengers, only for the Punisher to arrive.

Spider-Man manages to trap Raxton in asphalt, and Harry provides him with a cure that Oscorp had been working on upon using volunteer Charlie Weiderman, the other "Molten Man".

[17] Originally, Mark Raxton was given unnatural powers after the exposure to an experimental liquid metal alloy obtained from a meteor discovered by Spencer Smythe.

His body completely absorbed its organic properties, turning all of these external tissues into a solid metallic substance, as well as trunks, belt, and boots he wore right before the accident.