Jo Nah aka Ultra Boy. This lad from the planet Rimbor-One was traveling through space when he and his vessel was swallowed whole by a gigantic energy beast. Freed from it by the Science Police, Jo Nah found that he had absorbed some of the beast's energy, which seemed to derive from its Kryptonian ancestor centuries earlier. Able to manifest one superpower at a time, such as superstrength, invulnerability, flight and visual abilities, Jo Nah became Ultra Boy. While with the Legion of Super-Heroes, he formed a romance with his teammate Phantom Girl that lasted throughout the years.
Reiter was a prominent major in the German forces, administering a concentration camp during the early days of World War II, when one of his camp's prisoners Hank "Steel" Heywood caused a series of events which led to a prisoner throwing a vial of acid in Reiter's face. In order to combat the trauma, the Nazi leader Hitler himself orchestrated a series of experiments which led to the major gaining the ability to manipulate his body's energies to superhuman level. This led to his having Superman level powers, but only one superpower at a time such as superstrength, invulnerability, flight and visual abilities. As Baron Blitzkrieg, Reiter became a bitter foe of the largest assemblage of superheroes on his world in the All-Star Squadron.
Tinya aka Phantom Girl assisted the Legion in locating Jo Nah when he had been exiled due to an energy blast from a foe centuries into the past, become an non corporeal phantom. Merging his mind with that of 20th century teammate Superboy, the two became the mystery man known as Reflector, until the Legionnaires learned the truth and restored Jo Nah's natural state of being. It was while dressed as Reflecto in Superman's body that Jo Nah truly mirrored Blitzkrieg in appearance, if not in disposition.