The so-called Heavenly Thunder Origin Returning Marvelous Technique.
In truth, it was a secret art that used the power of thunder to stimulate the Primordial Spirit, thereby awakening one's potential and increasing the Primordial Spirit's foundation. It was not a method for cultivating the Primordial Spirit.
As for how effective it was, that depended entirely on the individual's potential.
If one's potential was high, the effect would be excellent. If one's potential was low, it would be like chicken ribs—tasteless to eat, yet a pity to throw away.
To a certain degree, potential could be equated with aptitude.
It changed a cultivator's Primordial Spirit foundation from the root.
It was also a secret art that defied the heavens and changed one's fate. It merely walked upon the righteous path: its effects were slow, its practice was difficult, and it was far from possessing the Demonic Fetus Secret Art's ability to show results so quickly.
But...
For Wang Yu, he was currently in a state where his Primordial Spirit was incomplete. If he could stimulate the hidden foundation within this portion of his Primordial Spirit, then supplement it with a large amount of Soul Dao Refined Essence...
He should be able to shorten that long three-hundred-year recovery cycle.
To within a few decades.
Thus, this Heavenly Thunder Origin Returning Marvelous Technique had arrived at exactly the right time. Although the Black Demon Demon inside him could serve as the Thunder Seed to activate this technique, its grade was ultimately still a little too low.
He needed an even more powerful external force to stimulate it.
The core skill within this marvelous technique was called the Life Force Spirit Seal. If he wanted to comprehend it completely, he would also need to put in bitter effort before he could master it with