In a time long passed, our world was shared by folk and idol alike, but the affairs of idols did not sit well with the other denizens of Driezeil. Eternal conflict between the idols brought great destruction upon the lands and great suffering upon its people.
Eladrin had long mastered the arcane magics through careful manipulation of the confluence. They protected their secrets with great care, entrenching themselves in the mountains of Yllthal as they built their utopia. Eventually, they too fell prey to the whims of the idols when a great calamity befell the city of Yllthalas.
King Almisser led a battalion of magi to push the idols back into the seas. Their mastery of the terrain was unparalleled, but even their most powerful magics proved ineffective against the idols. Eladrin commanded the confluence, but idols were born of it. A simple command of magic was not enough to combat those infused with it. Almisser fell along with his battalion, leaving a kingdom without a king.
The Blood Priests of Yllthalas sought to create idols of their own. They bestowed the last of their magics upon the daughters of Almisser before sending each on a quest: Sail the far reaches of Driezeil, find the fiercest champions of the land, and craft them into eidolons. Eidolons were the first of the arcane-blooded mortals; ordinary creatures infused with the confluence and transformed into mighty weapons. The youngest daughter, Winfrey, sailed to the nearby kingdom of X. She knew only playful innocence. She brought to life the shadows and wisps that play in the light. The medial daughter, Tristan, sailed to Y. She had heard the tales of war and sought to craft warriors that were mighty and strong. The eldest daughter, Dargona, sailed to the coasts of Z. Dargona was both educated and clever. She knew victory could not be won by strength alone. A single arrow could fell the mightiest warrior. Victory belonged to the cunning and ruthless. Only those willing to lead and sacrifice could persevere. Her eidolon was a flying serpent with a powerful attunement to the elements.
With their eidolons in tow, the daughters of Almisser sought retribution against the idols. Most were forced through portals to the outer planes, some departed willingly. After their passage, all but the most primordial of planar connections were severed. Idols who escaped exile were hunted to extinction; their remains still litter the land and sea. When the idols were divided from the world, the confluence that flowed through them was freed and began coursing throughout Driezeil.