Many legends abound in the worlds of Aurius about how the plane of existence came into being, though most have a clear theme of there being opposites that became inextricably bound together. These are referred to mononymously throughout all cultures as the light and the dark, otherwise known as presence and absence, stasis or change. This is notably a feature derived again from The Elder Scrolls, where such beings are without agency or consciousness and are only primarily primordial forces.
The Arethara, as descendants of the Cephareth, believe in the initial emergence of Caelarkhe, who emerged first as a primordial and paradoxically inclined agent of stasis that yet managed to influence all forms of life throughout the mortal plane and beyond. Upon the force's inception, there was a stability to the world, and spirits could come to know themselves along the polarities of Caelarkhe and the being's absence. Thus was born the Sorya, who had become bound to Caelarkhe's light and stasis, thus producing an eternal sustenance, and the Novya, who existed in exception to Caelarkhe but yet could only come to be because they knew that they were not like Caelarkhe. Then, the process of Auroris would begin, as the Novya, who were beings of chaos and change, causally affected the Sorya who nonetheless managed to remain perfectly intact and eternal in their being. This action caused the Sorya to bleed, and from the ethereal blood came perfect soul and vitality, and it then mingled with the diametrically positioned void to create the Aurya, who could further incarnate into the place in which the blood first became diluted so that new sources of power and being could emerge. The first of the Aurya to become were the ancestors of the Arethara and all elven peoples, the Cephareth, and they incarnated into the forms that were most reminiscent of the Sorya and their great being. The Cephareth retained the gifts of the light, having crystallized into existence simply by the token of their trapping of the Soryi blood within them and their being. This event is referred to as Auroris, the binding bloodshed, and is found in greater detail at this given link.