The air over the Yellow River at Mengjin was thick with more than just the golden silt that gave the waterway its name. It was heavy with the scent of incense and the crackle of impending divine retribution. The transition of the Mandate of Heaven from the waning Shang Dynasty to the rising Zhou was not merely a matter of mortal swords and shields; it was a cosmic upheaval that drew in the residents of the celestial peaks and the hidden grottoes of the world. Among these was Bi Xiao, the youngest of the Three Fairies of the Three Fairy Island. Along with her sisters Yun Xiao and Qiong Xiao, she had spent centuries in tranquil cultivation, far removed from the dust of the mundane world. However, the death of their brother, the powerful deity Zhao Gongming, at the hands of the Zhou commander Jiang Ziya, shattered their peace.
Bi Xiao, known for her spirited and impulsive nature, could not contain her grief or her fury. While the eldest sister, Yun Xiao, initially counseled patience and adherence to the will of Heaven, Bi Xiao’s arguments for familial loyalty and the pursuit of justice for their brother eventually won over her siblings. They descended from their island and arrived at the banks of the Huáng Hé, the Great River, near the strategic passage of Mengjin. This location was not chosen by chance; the river here was a churning force of nature, a symbol of the earth's power and the source of the ancient Yellow River Map or Hetu, which held the secrets of the cosmos. It was here that they would make their stand against the advancing Zhou forces.
To halt the Zhou army, Bi Xiao and her sisters deployed a formation of such complexity and lethal power that it threatened the very fabric of the celestial hierarchy: the Nine-Bend Yellow River Array. This was no mere arrangement of soldiers. It was a metaphysical trap, a labyrinthine construction of shifting sands, divine winds, and illusory pathways that mimicked the winding, treacherous curves of the Yellow River itself. At the heart of this array was their most potent treasure, the Mixed Sky Primordial Dipper, also known as the Hun Yuan Jin Dou. This golden vessel possessed the power to capture anything between heaven and earth, stripping away the spiritual essence of those trapped within its confines.
As the Zhou army approached, led by Jiang Ziya and protected by the Twelve Golden Immortals of the Kunlun Mountains, they found the path forward obscured by a dense, golden fog. Bi Xiao stood atop a high platform within the array, her eyes flashing with a mix of sorrow and defiance. She challenged the immortals to test their wisdom and cultivation against the formation. The Twelve Golden Immortals, confident in their thousands of years of practice and their mastery of the elements, entered the array one by one. They believed their status as senior disciples of Yuanshi Tianzun would protect them from the machinations of the three sisters.
However, the Nine-Bend Yellow River Array was designed to humble even the most enlightened beings. As the immortals navigated the winding passages, they found their senses dulled and their magic failing. The silt of the river, energized by the sisters' spells, acted as a spiritual abrasive, grinding down their 'three flowers on the head' and 'five qi in the chest'—the very markers of their immortality. One after another, the great sages who had advised kings and commanded the elements were caught in the Mixed Sky Primordial Dipper. They were rendered powerless, reduced to the status of ordinary mortals, and cast into the dungeons of the array. Bi Xiao watched their fall with a grim satisfaction, believing that the scales of justice were finally being balanced for Zhao Gongming’s sake.
The capture of the Twelve Golden Immortals sent shockwaves through the heavens. Jiang Ziya, left without his most powerful protectors, was forced to halt the Zhou advance. The war for the Mandate of Heaven had reached a stalemate that could only be broken by the highest authorities of the Taoist pantheon. Recognizing that the Three Fairies had violated the cosmic order by attacking senior immortals, the Great Sages Laozi and Yuanshi Tianzun descended from their celestial palaces. They arrived at the banks of the Yellow River, their presence calming the turbulent waters and thinning the magical mists of the array.