Training in all three traditions of Senjutsu followed a gradual progression: first taking in a certain amount of sage power to let the body begin adapting to Sage Transformation, then seeking further breakthroughs!
The specific methods differed.
In Ryūchi Cave, the White Snake Sage injected sage power directly-a simple, brutal approach.
At Mount Myōboku, toad oil was applied to the skin, allowing natural energy to be absorbed passively.
In Shikkotsu Forest, one soaked in Katsuyu's Sage Pool and actively drew in sage power by "cultivating the mind." If the mind was not still, the sage power would not stir.
After Sasuke sincerely apologized, the White Snake Sage stopped holding his offense against him.
"Come here, young one!"
Sasuke took three steps forward.
Swish!
The White Snake Sage extended her body from where she coiled upon the Throne, sinking her fangs into Sasuke's neck!
Hiss, hiss, hiss... The instant that pure, potent sage power entered him, Sasuke's skin turned grayish white. His hair grew longer, markings appeared beside his nostrils, and wings resembling monstrous hands sprouted from his back!
Kabuto Yakushi focused his gaze. "That's the Cursed Seal Sasuke-kun once lost. The White Snake Sage's power has awakened it!"
"Oh?" The White Snake Sage watched Sasuke's changing body with her slit pupils. That brat Orochimimaru tampered with him before, giving him a very high affinity for my sage power. Now I'm rather interested to see just how much he can withstand...!
Kabuto Yakushi felt even more nervous than when he had received sage power himself. That was only the primer. What comes next is the real test. Can you endure it, Sasuke-kun?
Hiss, hiss, hiss, hiss...!
As excessive sage power poured in, the strain began to show. First, veins bulged across Sasuke's face. Then masses of fleshy growths sprouted over his