Kryptonian (Earth-79)

"You are no kryptonian, yet you are tainted with one's DNA!"

- Kal-El Kryptonians are a technologically advanced race hailing from the Cygnus system, part of the Cygnus constellation. Living under the gigantic red sun named after their supreme god, Rao, the Kryptonians lived comfortably for thousands of years, expanding their empire to distant planets and even other star systems and galaxies. For once, their expansion was known as the Golden Age of Krypton, when those living on Krypton themselves also ushered a peaceful era. However, many years later, the era ended and Krypton descended into chaos when a member of their Thinker Guild and one of the "brighest" minds on the planet, Kal-El, set out to absorb Krypton into the Phantom Zone after he was double-crossed by his allies and got exiled into the said dimension. Kal succeeded in doing so, destroying Krypton and all its colonies, as well as killing all known Kryptonians in existence. With their essences and spirits lying around the Phantom Zone mindlessly under Kal-El's rule as the Shadow King. Luckily, the Kryptonians' legacy do not simply end that way. When astronaut Clark Kent was sent to space in an exploration mission, he entered the boundaries of the Phantom Zone and had himself endowed with the powers of a Kryptonian under a yellow sun by Bar-El, who somehow still managed to retain his physical form in the zone and wanted him to continue their legacy. Since then, Clark/Superman is known as a Kryptonian, albeit a hybrid one. Truly, the last Kryptonian existence is Kal-El himself, who doomed the planet and all connected to it and its inhabitants.

In the 31st Century, with the inspiring heroism of Superman, a successor of his is granted the genetic structure of a Kryptonian under a yellow sun with some modifications, through an experimentation similar to those that Bar-El gave to Clark Kent. This successor is a member of the Legion of Super-Heroes known as Hyperion, who's regarded as an "artificial" Kryptonian, different to the hybrid nature of his predecessor due to his processing of cosmic energies instead of solar energies.

Kryptonians are also known to be the race in which the Viltrumites originate from. In fact, the Viltrumites are actually greatly distant cousins to the Kryptonians that have genetically evolved and altered naturally after centuries of existence.