Beneath a huge waterfall, Sage Fukasaku and Jiraiya arrived with Naruto.
"Wow, what a huge waterfall! Wait, what a strange smell." Looking at the waterfall from afar, Naruto had not noticed anything yet.
Once he drew closer, however, he discovered that what flowed down the waterfall was not water at all, but a slick, greasy liquid.
"Ah, this brings back memories. This was where I trained in Senjutsu back then."
Jiraiya looked at the familiar waterfall and the places to sit around the pool below, nostalgia showing in his eyes.
"Your mind was too restless back then, kid. Otherwise, your Sage Mode training wouldn't have fallen short, leaving you neither human nor toad."
Fukasaku rolled his eyes at Jiraiya, then tapped the ground with his staff and pointed at the pool beneath the waterfall as he spoke to Naruto.
"Naruto, this is Mount Myōboku's specialty, toad oil."
Naruto looked curiously at the gleaming, oily waterfall and reached out to touch the water in the pool, only for Fukasaku to strike his hand with his staff the next second.
"Oww! Grandpa Fukasaku, what was that for?" Naruto felt a burst of pain, not just in his flesh, but in the chakra inside him too.
"Honestly, why do all you youngsters want to touch it first whenever you come here?" Fukasaku looked at Naruto, then at the slightly embarrassed Jiraiya nearby, before explaining to Naruto.
"Toad oil helps people sense natural energy so they can absorb it and form senjutsu chakra."
"But for beginners, natural energy is very dangerous. If too much natural energy rushes into your body at once, your body will go out of control, and you'll end up turning into a toad, then into stone."
At that, Fukasaku pointed his staff at a distant cluster of petrified toads. Some