Fang Bai's mouth uttered strange and secretive phrases, which were from the Beast Taming Scripture, a secret technique of antiquity he had learned in his previous life.
Using the Thread Condensation Sound Transmission Technique, Fang Bai recited the Beast Taming Scripture, aiming at those Spirit Beasts lurking at the bottom of the Nether River. Naturally, Huang Miao and the others could not hear it.
The Beast Taming Scripture Fang Bai had learned was a secret technique left behind by a powerhouse of ancient times. When Fang Bai recited the Beast Taming Scripture, those arcane and intricate phrases turned into special sound waves, which, combined with Fang Bai's Divine Sense, could instantly invade the brain domain of the Spirit Beasts, influencing their will and thus achieving the purpose of subduing and controlling the Spirit Beasts.
A Martial Artist in possession of the Beast Taming Scripture could control Spirit Beasts of different ranks depending on their own strength.