History: (Doom Patrol vol. 1 #98)-John Dubrovny was always an average man. In school he got average grades, later he got an average job and married an average wife. John wanted to be recognized as above average, and this drove him to invent a device that could turn lead into gold. The alchemy device he created did not work in the manner he intended, but it did work. He was accidentally bathed in his creation’s energy and transformed into the very elements he sought to control. He named himself Mr. 103 and started a life of crime. He fought the Doom Patrol, but their leader Chief discovered a way to neutralize his powers.

He fought the Doom Patrol on a few more occasions, failing each time. As new periodic elements were discovered, he changed his name to Mr. 104, and later Mr. 105.