Origin

Owen Reece was a lab assistant working at an atomic plant. One day he accidentally activated a machine that open a tiny portal into another dimension. Owen was exposed to a radiactive blast that left his face scarred and gave him the power to control matter at a molecular level.

Reece was never the popular kid in school. Having struggled for so long, forced to follow the whims of others, Reece decided now was his time. Reece easily defeated the Fantastic Four and gainned control over the Baxter Building. The Fantastic Four allied themselves with Uatu the Watcher and tried to stop Owen Reece from taking over a city. The Fantastic Four were met defeat again and were forced to leave the city in order to take down Reece. Mr Fantastic researched and studied about Reece and discovered Reece's weakness. Reece could manipulate molecules but he was unable to effect organic matter. The Fantastic Four wrapped themselves in plaster and were sent as statues by Alicia Masters. Reece believed that he could control all matter and used his powers to crush the plastered Fantastic Four. The feedback from the organic molecules caused Reece great pain and Uatu the Watcher bannished the Molecule Man to a dimension where time is accelerated. Reece became very lonely and he created a "son" to comfort him. When Reece was about to die, he transferred all of his powers to the wand and gave the wand to his "son". Reece then died soon after.

Reece's creation sought revenge and made it's way back to Earth. He battled the Fantastic Four and was winning at first until the Thing seperated him from the wand. The wand ensured the existence of Reece's son and was immediately vapourized when the wand was seperated from him. However, Reece's energies were stored in the wand which allowed Reece to temporally take control of the Thing. The wand eventually was passed on to several people until the Silver Surfer discovered it. Reece recreated a new body for himself and decided to destroy planet Earth. The Silver Surfur assembled the Avengers and asked the Avengers to stop Reece from devouring the planet. The Avengers were badly defeated, the Molecule Man vapourized Iron Man's armour, Cap's shield, the Silver Surfur's surfboard and even Thor's mighty hammer. Reece eventually was comforted by Tigra and ended his evil vendetta and restored Earth back to normal.

It turned out that Reece's accident that opened the tiny portal, allowed an omniscient being to observe the Marvel Universe. Unfamiliar with the emotional traits such as greed, good, and evil, this being, calling itself the Beyonder, wanted to find out more. The Beyonder transported several heroes and villains on a planet created by pieces of other planets and offered a prize. Whomever could win this "Secret War" could have whatever they wished for.

It was during the Secret Wars that Owen met and fell in love with Volcana, another super-powered villain. He vowed to live a life at peace with her in the suberbs of Denver. Later overcome with his need for power, Volcana left him. Owen is determined to win back her affections.

Soon later, Reece was confronted by Kubik, who was actually a Cosmic Cube which developped sentient life. Kubik told the Beyonder and the Molecule Man about the Cosmic Cubes. The Beyonder and Owen decided to merge together to form a new Cosmic Cube. This new Cosmic Cube also developed sentient life and named itself Kosmos.

Kosmos soon exspelled the Molecule Man and stripped off all of Owen's powers. Volcana gainned some of Reece's powers and found Reece in his old apartment. A.I.M wanted to study the great increase of power in Volcana and sent Klaw to kidnapp her. Reece's power inside Volcana evolved and Reece once again became the Molecule Man. Volcana and Reece easily defeated Klaw but Volcana left Reece soon after. Reece still was in love with her and claimed that one day he would prove his love to her.

Powers

Molecule Man has the ability to manipulate all forms. He originally believed he could only affect inorganic materials but with the help of Dr. Doom and his stolen Beyonder power, he removed Molecule Man's mental blocks that allowed him to control all molecules in the entire multiverse. Making his powers nigh-limitless.

Molecule Man has the potential to be one of the most powerful Marvel characters.