Powers: Endowed with powers nearly as great as Superman's, plus the scientific knowledge placed in his brain, Ultraa was one of the mightiest beings alive. His strength was incalculable, his speed tremendous. He could fly and had super-senses. He was also nearly invulnerable, though not to the extent that Superman is.
Bio: 18,000 years ago, a star went nova and the inhabitants of a distant world fled their planet in a giant space ark. Upon entering Earth's solar system, the ark was damaged and fell into the sun, but a single survivor was sent to earth. The child was raised by aborigines and grew up to be the first super-hero of Earth-Prime -- Ultraa! First encountered by the Justice League of America, Ultraa was brought to Earth-1, but has only made rare appearances in the DC Universe.
Notes: Only one other super-powered being arose on Earth-Prime before the Crisis on Infinite Earths: Superboy of Earth-Prime.