Jade Pool Heart Sutra.
This is the cultivation technique of the Jade Pool Immortal Palace.
The Jade Pool Heart Sutra can only be cultivated by women who possess abundant Yin qi.
Men have more Yang energy, while women are richer in Yin qi.
Cultivators stabilize their state of mind and refine their heart power, thereby using it to control all things.
Once trained to proficiency, one can use heart power to manipulate external objects, making them stronger by harnessing one's own strength—as seen with Ji Qianyao's silks.
When achieving perfection, one may even conjure any weapon or form of attack with a single thought.
This leaves opponents completely defenseless.
This cultivation technique relies on heart power and individual strength; as both increase, any external object controlled or conjured at a thought will become even more powerful.
At the same time, if one wants to unlock the advanced layers of the Jade Pool Heart Sutra, one must pass extremely arduous trials.
