In the beginning, there was nothing in the universe. Not even a single speck of light existed in its merciless, cold ocean, and it attacked everything that tried to exist with unrelenting fury. It thought that being empty was happyness, that to live without facing existence was the perfect way of life. And then, it came.
It was much stronger than the universe, so strong that it could crack open the universe's impenetrable shell and force itself into it. It was pure devastation given form, a being that was mightier than what the universe has ever faced. It had no name nor purpose, and only found bliss in destroying everything, and thus, it challanged the universe. The universe, knowing that it could not last against such a foe, decided to delay the inevitable and let life come into it. The sudden influx of subatomic particles, atoms, molecules, material, living beings, planets and stars created a cataclysmic explosion, which had the power to knock out the being that came into the universe.
But the universe knew that such a strong opponent would not stay dormant for long, and thus, made it so that life had a right to exist in it. It restructured its laws to allow for the existence of sentient beings, and made it so that they would get stronger and stronger over time, creating living weapons to defeat the being that dared to challange its rule. And when the harbinger of destruction is eventually defeated, the universe will go back to the way it was before, until another being dares to journey across its ocean.