C2270 A Precious Land
The Nine Secrets of Immortal Dao was created by the Supreme Dao Ancestor. This kind of Arcane Art of Immortal Dao was renowned throughout history, and was known as an undefeatable secret technique.
The most crazy thing was that in order to learn this secret technique, there was no need for any conditions, nor would it be something that only the people in the Immortal Dao could learn