Reed Richards (Earth-4208)

Reed Richards is a scientist who developed Unstable Molecule gear alongside Sue Storme, that caused the two of them, plus Johnny Storme and Ben Grimm, to mutate and gain superhuman abilities.

Unstable Molecules
While working for the military to create new gear for soldiers, Reed and Sue discovered "Unstable Molecules". They quickly found that it caused the gear to blend into its' surroundings when given an electrical charge. They used it to develop camouflaging suits for soldiers to wear. The project went well, and several weeks later finished their work. After being given permission to test it, Reed and Sue came to the decision of choosing Sue's brother, Johnny, and his friend, Ben, as test subjects. They decided to test it themselves as well. On the day, they put the suits on and went through an obstacle course to test it on various surfaces. However, during the test the unstable molecules caused the four of them to collapse. Being rushed to the hospital, the ambulance with Reed and Sue tipped over. While reaching out to hold Sue and keep her safe, his arms stretched, and Reed realised his body had mutated.