Basically, there was an original god(the first thing ever) that created the universe. He used all his energy to create the universe, his husk of a body became Thral, the first of the new gods and the caretaker of everything living thing the universe. Thral in this new universe saw the coming of sentient creatures, and knowing that they would need guides spawned the second of the two gods from himself. He created Inari, the healer and the mother of sentient to guide them to life, along with her he made Neth the Keeper of all knowledge to provide the humans with the information they would need to survive. After Inari and Neth guided the sentient for a time the mortals began to split and argue with one another, the knowledge that the first two gods had provided had been too much and the humans began to argue amongst themselves. From this conflict and the powerful emotions were born two more gods, without the actions of Thral, Inari or Neth the gods of war came into being. Salee came to light as the protector, Kalee came into being as the aggressor of all things. As soon as the gods of conflict arrived to the world of sentient their influence bred war, and with war came the god of blood and death. Ithari came into being already born into blood, his wrath unspeakable and his power untold. From war inevitably was bred disease. The blood, wounds, and suffering of war bread the creation of disease and suffering. Liad came into being as master of plagues, and through war his plagues spread like fire. Along with disease war bread another thing. The two sides of the conflict would spy and prod at one another, they would steal and sneak about, and form this Aatrox was created. The Deciever and the greatest of all liars and with him came his sibling...indulgence. Hali was born on the backs of the nobles who stayed away from the war. He was created due to their hubris, their need for indulgence, an their complete lack of concern for the world itself. Thus the nine gods came into being, the first created to oversee the universe, the second and third created for the good of sentients, and the other six by the sentients own flaws. The original nine gods were born, they were created and set about their path by greater forces than even them, they worked together, fought one another acted as all opposing forces would. The gods played out as their natures pushed them too, some helping, some hurting, and some doing nothing at all. The Nine gods worked like this for thousands of years, but what of the tenth? The final god of the pantheon, Erebos the Devourer. Erebos was born from the blackness of space from the wilted and dying soul of the creator. From the nothingness that was the universe and from the remaining life of the first The Devourer came into being. Either by the will of the gods, or the will of the chaos of the galaxy Erebos came to being. His only goal was to devour, to destroy, and sow destruction. First he would consume the mortal plane, and then the gods themselves.
This is the basic story for The Creation i had in mind when creating the faction, input is appreciated but honestly straying far from this would mess up how the gods function with one another.