Thousand Year Flood
Geological / environmental event
The Planar War begins and Ezzoal releases the Flood of Primordial Waters.
Before the Flood
In the time before the Flood, there was a plethora of gods and pantheons. The most ancient of these beings were the gods of order and chaos. These gods were the original architects of the Material Plane. The gods of order created the planets, physics, time, and landscapes. The gods of chaos filled these worlds with life and gave life agency and free will. At the heart of the Material Plane was Phoenix, a planet that lay nestled on the back of the Primordial Goddess Ki.
The Storm
As life expanded and adapted, mortals began to praise gods and goddesses; the king of the gods of order, Rovius, felt frustrated by the lack of structure of how a mortal's life would go. He worked alongside Tamiios, Treald, Nidra, and Lanua to figure out a structure. The five of them created a tome that cataloged the fates of mortal life; any decision a mortal would make for their entire life was written out and decided.
When Rovius presented this tome to the gods of chaos as a tool, Zuva took immediate offense to it. Life was the responsibility of the gods of chaos. In Zuva's opinion, this tome crossed a boundary. Zuva took the tome and transformed it into a mockery of the tome's original intent: the Tablet of Destinies. The tablet fractured the lives of mortals across even the tiniest and most insignificant of choices; this crafted a vast and confusing multiverse of possibilities.
Zuva presented the Tablet of Destinies to the gods of order. The gods of order hated the item; something chaotic yet so orderly deeply offended them. Soon after this meeting, a wizard on the Material Plane received an anonymous order from Utopia to create a powerful weapon. The wizard returned with a firearm, the first of its kind. Zuva was found later with a bullet in his skull.
Ezzoal, queen of the gods of chaos and wife of Zuva, knew the gods of order were to blame, and the alliance the gods had for so long was now forfeit. Ezzoal smashed the borders of her demiplane, the Abyss, and released a flood of primordial waters across the Material Plane.
The Flood washed over everything on Phoenix, submerging the entire planet and leaving scarce few survivors. The land was drowned in a sea of monsters and chaos. Even drinking from the primordial waters was dangerous. Consummation of the liquid tied one to Ezzoal herself, and they would forever be plagued by visions of the Abyss where she dwells.
The people of Phoenix were forced to live on massive arks. Most records of life before the Flood have been lost. The only remnants are glimmers of a fantastic realm with impressive technology.