Naruto approached the tree and reached out to touch the trunk.
A warm touch came from the fingertips, and there was an indescribable vitality.
"What you have to do is very simple." Wu said, "Sit under the tree, enter Sage Mode, and then absorb the Natural Energy here."
"It doesn't sound difficult."
"But it's very dangerous." Wu warned, "The Natural Energy here is too strong. If you don't control it well, the energy will backfire and turn you into stone."
"I know." Naruto sat down cross-legged under the tree, "I learned how to control Natural Energy at Mount Myōboku."
"The Natural Energy there is different from here." Wu said, "The energy of Mount Myōboku is gentle, but the energy here is violent."
"Then I want to give it a try." Naruto closed his eyes, clasped his hands together, "Let's get started."
Wu stepped aside and looked at him quietly.
Naruto's body began to glow, and golden Chakra surged out of his body, forming a protective layer around him.
Then, he began to absorb the surrounding Natural Energy.
It went smoothly at first.
Natural Energy is like a gentle stream, slowly flowing into his body and being assimilated by his Chakra.
But soon, the situation changed.
The flow speed of Natural Energy suddenly accelerated, turning from a stream into a river, and then from a river into a flood.
Naruto's body began to tremble.
"It's too fast..." He gritted his teeth, "I can't control it..."
"Don't panic." Wu's voice came, "Don't try to control it, but guide it."
"Guide?"
"Natural Energy is alive." Wu said, "It doesn't like to be forcibly controlled, but it is willing to be guided. What you have to do is not to put it in a cage, but to show it a way."
Naruto Try to calm down and do as Wu said.
He no longer tried to suppress the violent energy, but opened a channel in his body and let the energy flow along this channel.
The effect is immediate.
Although the flow rate of Natural Energy is still very fast, it is no longer so violent. They circulate in his body along the channels opened by Naruto, and are then assimilated little by little by his Chakra.
"Yes, that's it." Wu nodded, "Keep it like this."
Time passed by minute by minute.
Naruto's body began to change.
Golden lines appeared on his skin, which were traces of Natural Energy flowing in his body.
His Chakra is also recovering quickly, and the quality is higher than before.
"This feeling..." Naruto murmured to himself, "It seems like the whole forest is helping me."
"Because you are Resonance with this forest." Wu said, "First Hokage also practiced this way back then. The reason why his Wood Release is so strong is because he can Resonance with nature."
"That's it..."
Naruto continues to absorb Natural Energy.
His Chakra is recovering quickly, and his physical fatigue is also fading.
But he knew that this was not enough.
In three days, he not only needs to recover Chakra, but also needs to become stronger.
Strong enough to defeat Ōtsutsuki Isshiki.
"Kurama." He called in his heart.
"What are you doing?" Nine-Tails's voice sounded, "You're really good at it."
"I need your help."
"Want to borrow my Chakra again?"
"No." Naruto said, "I want to be completely integrated with you."
Nine-Tails was silent.
"Do you know what that means?" Its voice became serious, "Complete integration means merging my consciousness and your consciousness into one. At that time, there will no longer be Nine-Tails and Naruto, only a brand new existence."
"I know." Naruto said, "But this is our only chance."
"Aren't you afraid of losing yourself?"
"Don't be afraid." Naruto smiled, "Because you are also a part of me."
Nine-Tails was silent for a long time again.
"You kid..." There was a hint of helplessness in its voice, "There's really nothing I can do against you."
"Then you agreed?"
"I agreed." Nine-Tails said, "But there is a condition."
"What conditions?"
"If you become a boring guy after we merge, I will Tenten scold you in your head."
Naruto laughed.
"Deal!"
Konoha, Medical Department.
Sasuke is lying on a special operating table, surrounded by complex Cursed Mark.
Toneri stood beside him, pressing his hands on his temples.
"Are you ready?" Toneri asked.
"Let's begin." Sasuke closed his eyes.
Green Chakra poured out of Toneri's hands and slowly poured into Sasuke's eyes.
Sasuke's body trembled suddenly.
It was not pain, but an indescribable feeling. It was like someone had put a ball of fire in his eyeballs, and it was like countless needles were piercing his optic nerve.
"Hold it." Toneri's voice was calm, "This is just the beginning."
Tenseigan's Chakra flows in Sasuke's eyes, trying to repair those pupillary channels that have been damaged by overuse.
But Rinnegan of Sasuke and Tenseigan of Toneri are essentially different powers, and there is repulsion between them.
"Damn..." Sasuke gritted his teeth and veins popped out on his forehead.
Sakura stood aside, clenching his hands so hard that his nails almost dug into his flesh.
"Is he going to be okay?" she asked quietly.
"I don't know." Shikamaru stood at the door, "This is the first time someone has tried to use the power of Tenseigan to repair Rinnegan."
"Then why take the risk?"
"Because there is no other way." Shikamaru looked at Sasuke on the operating table, "In three days, we must allow him to regain his combat effectiveness."
The operation lasted a full three hours.
When Toneri took back his hand, his face was as pale as a piece of paper and his body was shaky.
"Toneri!" Sakura quickly supported him.
"I'm fine." Toneri waved his hand, "I'm just a little tired."
He looked at Sasuke, "How is it?"
Sasuke Open your eyes.
The Rinnegan in the left eye lights up again, and the nine Tomoe are clearly visible.
"Successful." He moved his eyes, "About 60% of the pupil power has been restored."
"Sixty percent..." Shikamaru frowned, "Is that enough?"
"That's enough." Sasuke sat up from the operating table, "At least it's much better than before."
"That's good." Shikamaru breathed a sigh of relief, "Next, you need to rest and let your body adapt to this new power."
"No." Sasuke shook his head, "I want to practice."
"Are you crazy?" Sakura opened his eyes wide, "Your current physical condition..."
"I know my body." Sasuke interrupted her, "I can't waste three days."
He looked at Shikamaru, "Is there any place suitable for practicing Dojutsu?"
Shikamaru thought for a while.
"Yes." He said, "There is a secret training ground underground in the Uchiha Clan's Naka Shrine. There are Fuinjutsu formulas left by First Hokage and Second Hokage there, which can help you better control your pupil power."
"Take me there."