It is said that during the Shangu period, the Yellow Emperor and Chi You fought for nine rounds, but they were defeated in all of them. Huang Di retreated to Taishan and hid for three days and three nights. In order to defeat Chi You, Huang Di knelt on the ground and prayed to heaven.
At this moment, a great god with the head of a human and the body of a bird appeared in the sky, riding on the shining colorful clouds; Huangdi knelt down and prayed to the goddess to teach her the secret method to defeat Chi You.
Huang Di defeated Chi You with the "Qi Men Dun Jia" and "Liu Jia Yin and Yang Diagram" taught by the goddess.
Later, I heard that the goddess who taught Huangdi magic was named "Jiutian Xuannv". From then on, the spells used by the world were named after this woman, so the spells were also called mysterious spells.
Purpose: Thanks to the Dharma passed down to the world by the Nine Heavens Xuannv, the world can practice it. Now this is an era of Xuan Dharma. According to the legend: One Sword, Two Saints, Three Magic Techniques and Four Shuras are the pinnacle of the contemporary era.