Back in his room, Cheng Heng took out the ancient book from his robes and examined it carefully.
Vajra Internal Strength Technique
Externally tempered skin, flesh, sinews, and bones; internally nourished the five organs and six bowels.
The technique was divided into eight realms, advancing step by step: Copper Skin, Iron Flesh, Steel Sinews, Stone Bones, Strengthened Five Organs, Condensed Six Bowels, Vajra Qi-Blood, and Perfect Golden Body.
This was actually a superior martial arts technique. Not only could it forge an externally tempered body, but upon reaching the latter four major realms, it could even temper the five organs and six bowels.
"Where had Wu Yong obtained this Vajra Internal Strength Technique?"
"Thankfully, he had only cultivated it to the first realm. If he had reached the third, today would likely have been a battle with more chance of defeat than victory!"
After carefully reading the entire technique, Cheng Heng could not help but sigh with emotion.
This technique seemed to have already surpassed the scope of superior martial arts. Its three realms of Copper Skin, Iron Flesh, and Steel Sinews corresponded respectively to Bright Force, Hidden Force, and Skill-Transforming Force.
Could the five realms beyond those correspond to realms after Core-Embracing Force?
If so, this Vajra Internal Strength Technique was truly a rare and precious secret manual!
Cheng Heng hurriedly turned to the contents concerning the first realm, Copper Skin, and read through them.
[Destiny: Heaven Rewards Diligence] [Persevere without fail, and achievement shall surely come.] [Vajra Internal Strength Technique: Copper Skin (1/100)]
"Only 100 progress? Could it be because I had previously cultivated the Vajra Art?"
Cheng Heng was puzzled by the proficiency requirement for the first realm. With a progress value of only 100, he needed merely a few days to break through before