The Mythic Age
The writhing flames of the Elemental Chaos and the glittering expanse of the Astral Sea are the oldest structures in the known cosmology. They came into being from nothing, and from them was born almost everything. The focal points of the Chaos and the Sea began spilling forth their planes, and where the two met a great Confusion occurred. The Primordials and the Gods (from the Chaos and the Sea respectively) began to bicker over the new creation. While the discussion was happening, a Primordial whose name is lost to time began to shape the Confusion; from it She formed the world of Prim.