"I really have mastered the Rule of Thunder."
Lu Yan was overjoyed.
Based on experience, he was currently at the first level of the Rule of Thunder, and its application was still weak, just enough to enhance some combat power.
But he had confidence that in the Golden Lightning, his comprehension of the Rule of Thunder would be incredibly fast, allowing him to break through quickly.
He consumed a few Martial Pills to replenish his physical nutrients, then his primordial spirit re-entered the Nine Layer Heaven.
Time flew by, and half a year passed in a blink of an eye.
After half a year of hard cultivation, his soul power finally reached the limit of the fourth rotation of the Yuan God, just a step away from the fifth rotation.
Next, he only needed to condense the Primordial Spirit Manifestation to break through to the fifth rotation of the Yuan God.
Breaking through to the fifth rotation of the Yuan God would naturally not be possible in the Thunder Tribulation Ocean.
