Construction beginning/end
Before time itself, the world of Aerios was a primordial cognitive realm where only the potential for ideas existed. The Over-God desired to bring purpose to this infinite cognitive energy and so He created the deities of Purpose using this potential cosmic energy of ideas. Each of the six was created to give Purpose and breath life into the creation of the idea, yet as the Over-God created Purpose he knew it would have no meaning without chaos or as He called it, Opposition. Thus, six deities of Opposition were created and they spread chaos and devoided the cognitive realm of meaning. The older deities of Purpose saw the chaotic effect of Opposition and decided to create an anchor or Purpose a place where ideas would last and be unchanging, thus they built the world of Aerios.
Aumaunator created the Sun and the idea of light which would burn out the chaos of darkness. He then created the lands of Aerios and gave it the same shape as his sun which was a circle. The lands were green and fed off the sun which gave the perfect amount of light to allow things to grow and thrive.
Selûne created the moon, for she saw beauty in the night and wanted a light by which to see it. Thus she created the idea of beauty, causing the lands of Aumaunator to change color and cool his sun. Yet Selûne is a changing deity and she found the lands to be constant, so she created the sea to shape and change the lands over time and gave her moon the ability to rule over it.
Bahamut created the storms as he loved Selûne's sea and the lands of Aumaunator and so brought them together as one, creating the idea healing. The sun of Aumaunator he saw as a beacon against chaos and so caused it to intensify for a short while so as to keep chaos at bay. Bahamut then created the first creatures of Aerios, the Metallic Dragons of Purpose.
Xan Yae created death and she made the sun of Amaunator cool at the end of one year, for all things must have Purpose and so she created the idea of time by giving it an end. She then created twilight for change should happen slowly so one can appreciate the idea of life, and thus she also created the lotus flower as symbol of life and its ability to survive through time.
Thus Aerios was created and anchored the idea of life and time so that chaos could not sweep it away. Yet there were two deities remaining who found the world of Aerios lacking. For they saw creatures and plants who could never understand or appreciate these ideas as they could.
Mystra created the Weave and the idea of intelligence. She called this power magic and she decreed it the beginning of thought. Mystra permeated all creation with her magic and created lay lines where that magic could strengthened and weaken.
Deneir created secrets all over Aerios and the idea of adventure. He told nothing of the caves, unusual creatures or oasis he created to the other deities and kept no recorded of them for himself so that he might forget their creation. Deneir loves the endless possibilities of the primordial cognitive realm and saw Aerios was lacking as it had no ability to be unknown. Thus he also created luck and chance to randomize and create new things out of what the other deities had created.
Yet this was not the extent of Mystra and Deneir's plan for they brought the other four deities and showed them that Aerios would be better if there was someone new to discover it. Thus the Kalashtar were created and given Mystra's intelligence, Deneir's curiosity, Bahamut's wisdom, Amaunator's laws, Xan Yae's strength of will and Selûne's beauty.
Proud of their accomplishment, Purpose had created its ultimate form and the six cherished and protected it. Eventually Opposition learned of Aerios and they were displeased at Purpose's cleverness in creating a permeant idea. So the Opposition secretly came to Aerios and began creating their own chaos, in the hopes of changing and destroying the ultimate idea.