In the Primordial Age, there was only darkness and water. A lightless ocean under an endless black sky. The Primordials roamed these dark waters, preying upon each other and growing ever more powerful and stronger. But there were not yet any cycles, and time itself was meaningless. Only an eternity in complete darkness.
Change first apeared in the world with the arrival of the demons. Their search for power had brought the primordials into contact with other realms and their denizens, and conflict soon followed. In their rage, the demons unleashed fire on the primordials, and with the flames came the first light to lighten up the darkness. Eventually the demons were beaten back, or returned to their own realms on their own. But the primordials had suffered greatly themselves.
While the demons had left, the fires that had seared the primordials had not fully died down yet. The Moon Temis discovered a glowing coal and fanned it back into a roaring great fire that became the Sun, to create a permanent light to push back the darkness. The remaining primordials fled from the light that had hurt them, to hide in the darkest depths of the sea and lowest reaches beneath the earth.
Other sparks that floated in the vast open sky became the stars. And in their dim glow, the Twilight godddes Azuleira came to be. But the sun of Temis shone brightest, and other celestial bodies saw its light and gathered around it for warmth as well.