In the empty space near the corner of a universe, where no light had ever reached, there was an interesting phenomenon happening. This region had been covered within a cold, dense cloud of gas, consisting mostly of hydrogen and helium since the beginning of time, if there was any. From faraway space, a giant star had come to the end of its life and exploded. The supernova explosion impacted the cloud of gas in the region, causing the gas to collapse under its own gravity.
Under the impact, the cloud began to spin faster and faster until all the gas in the region flattened into a rotating disk, which gathered all the matter at the center. As more time passed, at the center of this rotating disk, nuclear fusion began — hydrogen atoms fused into helium, creating immense energy. At that moment, the region celebrated as it gave birth to its first star, a giant star that grew larger and larger as time went on.
Surrounding the star, dust grains collided and stuck together. Matter formed small clumps, and small clumps formed larger clumps. Gradually, eight giant planetesimals appeared, marking the birth of a star system.
The four planets closer to the star were heavily affected by its heat. On these planets, metals and rocky materials were common, while volatile materials such as water and methane struggled to survive.
The closest one to the star was the smallest planet, with a rocky, heavily cratered surface and no significant atmosphere. The next two were quite similar in size. The second closest one was covered by a thick atmosphere of carbon dioxide and dense clouds of sulfuric acid. The third closest one had a nitrogen-oxygen atmosphere and a strong magnetic field. Interestingly, 60% of this third planet was covered in water, which was the ideal place for the first lifeforms to begin. The fourth closest planet could be called the "Red Planet," with a thin carbon dioxide atmosphere and around 10% of its surface covered in water. Also, this Red Planet had a series of volcanoes that were unrivaled by any other planets.
In the outer part of the star system, the temperature was cooler, and the outer planets grew much larger into gas and ice giants. Most of them were freezing cold, with surfaces tortured by large storms and thick atmospheres of hydrogen and helium.
The first lifeforms were born on our third planet: the Red Planet. The water valleys, rivers and streams gave birth to the first species: the microbes. They varied from the subsurface Chemolithoautotrophy, which lived inside the rocks near the ground, feasting upon the chemical reactions between minerals to survive to the Sporemartian - a microbe that can goes into sleep for thousands of sols (A Red Planet's days) under harsh conditions. There are nearly 10000 different kinds of microbes formed during the next billion Red Planet's year.
Among the microbes, there was an extraordinary species: the Dragonogus. At the beginning, they were nothing spectacular. However, the microbes of his species shared a trait: they could absorb the traits of other species that they consume. Slowly, this microbe consumed the traits of other microbes and became the dominant species on the Red Planet.
The Dragonogus evolved into a slimy species that is as big as a small pond on the Red Planet. They traveled alongside water-sources. They ate microbes/other small living creatures or plants that they meet and evolve accordingly to the thing that they ate. Thus, their individuals all looked differently, with different colors, strengths and weaknesses. The only thing in common was that they were all in a slimy, watery form that helped them navigate through the smallest cracks on the vast rocky plains of the planets.
The Dragonogus was the only social species that came close to what we would call a "Highly intelligent species" among the universes. They built settlement together, near water sources and highly rich microbes' or mineral regions. Even though they could procreate individually, they stick together for higher survivability against hostile Dragonogus.
Clans of Dragonogus were formed and the most potent Dragonogus was normally chosen as leaders. The clans waged wars against each other for rich lands and rare genetics that give them stronger combat ability or survivability. Their cavern systems existed all over the Red Planet, leaving their marks for millenniums to come.
The endless wars lasted for at least a million sols before the Dragonogus's most intelligent individuals recognized a harsh truth: soon, the Red Planet will be inhabitable for their kinds.
For unknown reasons, the gravitational field on their planet is going to be weakened. And soon, the whole atmosphere of the planet will disappear for a few hundred years, all the current species will succumb to death, including those with high adaptability as their own. In around 10 years, three strongest clans of the Dragonogus: the Zeus Ogus, the Odin Ogus, and the Ra Ogus made an alliance with each other, and they brutally massacred the opposing clans, absorbing all the traits of others and became entities that can transform weathers, strike thunders, summon fire and storms.
However, the threat of extinction is still there. The three clan leaders, named accordingly to their clan: Zeus, Odin, and Ra absorbed all the members of their clans. Together, they created a temporary atmosphere shield, which enable them temporarily across the vastness of the universe. The last of their kind, carrying the fate of their species, they travelled into the cosmic.
Their destination was the third closest planet from the star of the system, which will be later called Earth: a planet with a single landmass, surrounded by oceans when they arrive. On Earth, the giant reptile creatures known as the dinosaurs were reigning, from vast plains and rocky mountains to the great depth of the ocean.
But Zeus, Odin and Ra were great at adapting to the environment. They hunted these giant creatures, absorbed their genetics and evolve. In a span of a few hundred years, they also evolved. The Dragonogus triple become three large creatures that're the size of mountains, with large wings a hundred times the size of pterosaur that created hurricane when flying and mouth breathing fire and thunders. Their head is large, angular with sharp horns or spines along the skull.
Furthermore, they had huge jaws with rows of razor-sharp teeth, four powerful legs ending in clawed feet, with spiked tails for defense. And with that, Zeus, Odin, and Ra became the first three Dragons, which were going to one of the most influential factors that's changing the history of this blue planet, Earth, for Millenium to come.