But after watching for a while, he shook his head again. "External help can only serve as a reference. If it isn't your own power, you can't master senjutsu!"
Jiraiya hurriedly explained, "The two of them aren't trying to practice senjutsu. They plan to use natural energy to perform a surgery!"
"A surgery? Young people's ideas are becoming harder and harder for a frog to understand." Sage Fukasaku clicked his tongue in amazement, then asked, "Tell me, what do you need me to do?"
"You only need to knock the natural energy out of their bodies when they show signs of turning into frogs."
"That's easy."
Seeing Sage Fukasaku agree, Jiraiya took out a small bottle filled with golden liquid. "This is Toad Oil produced on Mount Myōboku. It can help you sense natural energy."
"What you need to do is rely on your own conviction and willpower to keep yourselves from being eroded by natural energy!"
Sage Fukasaku reminded them from the side, "Once Toad Oil leaves the environment of Mount Myōboku, it vaporizes quickly. Even if I simulate the environment, it won't last more than five minutes!"
Seeing that neither child's expression changed, Jiraiya nodded inwardly and carefully smeared the Toad Oil onto their hands.
The others had long heard Jiraiya describe the terror of natural energy. When the golden liquid dripped onto Soseki's hand, their breathing unconsciously quickened.
Yet ten seconds, twenty seconds, one minute passed...
Not only Soseki, but even Mizuki remained perfectly fine.
Seeing everyone looking at him strangely, Jiraiya shook the little bottle and muttered, "That makes no sense. Could even Mount Myōboku's Toad Oil expire?"
Just as Jiraiya was wondering whether he should try it himself, Sage Fukasaku, standing atop the bedside table, leaped up and struck with his cane. Mizuki, who had