Kryptonian

Kryptonians are an endangered near-Human species from the now-destroyed planet Krypton. Superman is the last of the Kryptonians. They are the enemies of the Dheronian species as every twenty years they were at war for each other's treasures.

Powers & Abilities
Kryptonians, once outside their star sytem, acquire new abilities determined by the frequency of each sun's light and internal radiation. White stars, dwarf stars, and blue stars all give them different properties.

Yellow Sun Abilities

 * Superhuman Strength: Even from infancy Kryptonians can bend steel, reduce a wooden door to splinters, and shatter stone all with their bare hands. By age 20 they can demolish alien machines, lift large military vehicles, damage Dheronian metal, battle adult Dheronians far older than themselves with Human-level effort, and tear down mountains without even trying.
 * Superhuman Speed: Kryptonians can move and fly so fast that they appear as blurs. By age 20 they are fast enough to fly from Metropolis, USA to London, Hong Kong, Russia, Egypt, France, Tibet, Africa, and Hollywood all within the same hour.
 * Superhuman Endurance: Kryptonians can remain active for long periods of time.
 * X-Ray Vision: Kryptonians can see through walls.
 * Heat Vision: Kryptonians can burn objects with their gaze.
 * Healing Factor: Kryptonians can fully heal from wounds such as a cuts and bruises in a matter of moments.
 * Superhuman Senses: Kryptonians have heightened senses that allow them to see and hear things beyond Human capability; being able to hear conversations from far off distances and even over great noises and see across great distances. Superman was able to see from Metropolis USA all the way to Russia, Egypt, France, Tibet, and Africa; however, since sight is naturally limited to the curvature of the planet, his vision seems to be able to somehow curve as well, or utilizes his X-Ray vision in some unexplained way to aid this. They can also see at the atomic level.
 * Superhuman Mentality: Kryptonians can solve scientific and mathematical texts in a short period of time. This gives them many skills and natural talents, academic or otherwise.
 * Invulnerability: Kryptonians are immune to all non-Kryptonite and/or non-magical attacks, damage, illness and influence. They are also able survive in outer space without aid.
 * Flight: Kryptonians can fly.
 * Freeze Breath

Pulsar & Quasar Abilities
Power beyond imagining.

Weaknesses

 * Kryptonite: Kryptonians are vulnerable to Kryptonite. There are five 305px-20070424-kryptonite.gif types of Kryptonite, green, red, yellow, blue, and white, each with their own respective effects. Weapons and other materials made from or with Kryptonite can effect or even kill them just as they do to Humans.
 * Black Holes: Black holes consume them completely.
 * Magic: Their near invulnerability grants them no protection from supernatural forces.
 * Red Stars: They are depowered and reverted back to their natural state once exposed to the precise frequency (natural or synthetic) of their native red sun.
 * Dheronian Metal: Kryptonians can be hurt by Dheronian metal.
 * Kryptonian Metal: Kryptonians are fully vulnerable to Kryptonian metal.
 * Alien Organisms: Kryptonians can be injured or even killed by certain alien beings.

Technology
Kryptonian technology and architecture was mostly based on giant self-grown crystals which were very common on their planet and could be used to store information. These structures might have been natural or artificial, or a combination of both. Kryptonian technology was so advanced, that they had the potential to download inscriptions (including all of their knowlege) onto the very electrons of their ships and metals.

Culture
The Kryptonians had two primary culture traits: science and warriorism. The political powers on the planet were governed by a council of scientists and warriors (but mostly scientists). Each noble Kryptonian family (or "House") was symbolized by particular symbols which resemble Earth's alphabetical letters (such as "S" for El or "Z" for Zod). The red dwarf star, Rao of Krypton's planetary system was worshiped as a god, but in a more scientific manner than Earth's spiritual religions. Kryptonian Dogs were kept as pets by the Kryptonian people, much like Earth Dogs are kept as pets by Humans.

The Kryptonian people were a very xenophobic race that hardly ever left their homeworld, making Kal-El (a.k.a. Superman) the only Kryptonian left when the planet exploded.

Enemies
Kryptonians were somewhat of a self promoting and indulging race and were willing to utilize lethal force to take valuables from other worlds. The planet Dheron, the fifth planet from Krypton's red sun, was one such planet. Every twenty years, the planets were at war over each other's treasures. In an act of revenge, the two races disabled each other's star travel abilities. The Dheronians view theselves as the natural enemies of Kryptonians and are partially responsible both for the destruction of Krypton and the near-extermination of the Kryptonian race.