Xuanji Nine Leaves originated from the Labyrinth Divine Palace. It was a powerful and profound needle technique.
The Labyrinth Divine Palace back then was not only powerful in martial strength, but their Alchemy Dao was also unparalleled!
Disregarding other things, just this Hundred Herbs Illustrated Handbook was not what ordinary Hegemon level sects could come up with.
The various acupuncture techniques inside, poison arts, and other branches of Alchemy Dao were all-encompassing and contained everything.
When Ye Yuan entered the Labyrinth Divine Palace, he did not care about other books. He only paid the most attention to the alchemy-related books.
In the last few decades on the Rainclear Continent, Ye Yuan's martial arts did not make much progress. He spent a lot of time on these classics.
The Xuanji Nine Leaves was one of them.