Molecule Man, also known as Owen Reece, is a Marvel Comics supervillain and one of the most powerful beings in the Marvel universe. He was created by writer Stan Lee and artist Jack Kirby, and made his first appearance in Fantastic Four #20 in 1963. Owen Reece was a simple man who worked as a janitor at a nuclear research facility. One day, an accident at the facility gave Reece the ability to manipulate matter at a molecular level. With this incredible power, he was able to reshape and transform any object he touched. Initially, Reece used his powers for personal gain, using them to make himself rich and powerful. However, his actions soon drew the attention of the superhero team the Fantastic Four, who saw him as a threat to the world. Reece was defeated by the Fantastic Four and imprisoned, but he later escaped and continued to cause chaos with his powers. In addition to his molecular manipulation abilities, Molecule Man also has superhuman strength and durability. He is also able to fly and project powerful energy blasts. However, his powers are limited by his own mental state, and he is unable to use them at their full potential when he is feeling weak or unsure of himself.