Perhaps Ye Feng was not strong enough to recognize what these things were yet, but he immediately thought of the Three Great Sage Lands. It seemed that every ninja who had learned senjutsu developed certain traits, such as toad traits from Mount Myōboku and snake traits from Ryūchi Cave.
Natural energy had no biological traits, so the Three Great Sage Lands must have done something to it. The natural energy in Ryūchi Cave, for instance, seemed to contain something else, and that something seemed permanent. Even if someone stopped using Ryūchi Cave's natural energy later, those traits would still appear in their body.
At that thought, Ye Feng hurriedly warned Orochimaru:
"Don't absorb Ryūchi Cave's natural energy from now on, and don't learn its senjutsu either."
"Have you discovered something, Ye Feng?" Orochimaru was puzzled by his words.
"I'm not sure yet, but Ryūchi Cave's natural energy seems to have something unknown mixed into it. We'd best not touch it. Once we're strong enough, we'll naturally find out what's in it." Ye Feng did not know what it was, but he felt it was definitely nothing good. The farther away they stayed, the better.
This was hardly good news for Ye Feng. He had originally wanted to see whether he could cultivate using the natural energy of the Three Great Sage Lands. With how concentrated it was, it would certainly speed up his cultivation, but now it seemed he would have to abandon that idea.
Ye Feng felt a little disappointed at the thought. Who could have imagined that other things could be mixed into natural energy? Suddenly, shock appeared on his face. If things could be mixed into natural energy, could the same be true of tailed beast chakra? After all, it had been cut from a tailed beast's