Spirit Transformation Technique and Expansion Jutsu

"Oh, the Spirit Transformation Technique and the Akimichi Clan's Expansion Jutsu?" Sarutobi Hiruzen said in surprise.

Konoha's major clans also recorded some basic Secret Techniques in the Scroll of Sealing, demonstrating that the ninja village and its clans were one. However, these Secret Techniques were basic to begin with, and while clans' Secret Techniques had not developed into Kekkei Genkai, they still possessed a degree of bloodline inheritance. Outsiders found it difficult to learn them.

So even though the Scroll of Sealing contained the Secret Techniques of various clans, few were willing to learn them. The Akimichi Clan's techniques in particular required body fat, making them almost as rejected in Konoha as the Aburame Clan's Insect Jutsu.

However, while few learned them, many drew inspiration from them. Since Sarutobi Toru wanted to develop Medical Ninjutsu, it was only natural for him to study the Akimichi Clan's Yang Release Secret Techniques.

The Spirit Transformation Technique, on the other hand, was an advanced Yin Release ninjutsu. Its effects were remarkable, but its flaws were just as severe. The Main Body could not move while it was in use, and one had to fight by ejecting one's soul from the body. It had little to do with Medical Ninjutsu.

Though Sarutobi Hiruzen was puzzled by Toru's choice of the Spirit Transformation Technique, he did not press for answers. After everything that had happened recently, he had confidence in his nephew and believed Toru had his own plans.

Sarutobi Toru copied down the ninjutsu, secretly delighted. With the Spirit Transformation Technique, he could try studying the Dao Scripture of the Yang God.

The Dao Scripture of the Yang God was the item in the Reincarnation Warehouse that came closest to immortality. Though it had countless problems, its upper limit was only that of a Ghost Immortal, and the Shinobi World did not even have Thunder Tribulations, one had to take things one step at a time and eat one bite at a time. There was no harm in studying it first.

Still, the Dao Scripture was fraught with danger, so he did not dare train in it blindly. He would first examine this Shinobi World version of "Soul Ejection," compare the two, and then... let Orochimaru train in it.

Well, he would not cultivate it himself until his tool produced some results.

As for the Flying Thunder God and Impure World Reincarnation he had been yearning for, they were not only in the Scroll of Sealing. The Senju Estate had them too!

Given his relationship with Tsunade, how difficult could it be to borrow them for a look? Why waste his chance on the Scroll of Sealing? Though the Hokage was his uncle, he could not possibly grant him too much special treatment.

Having chosen his ninjutsu, Sarutobi Toru left the Hokage's Office and returned to his laboratory, preparing to make the medicine.

The office doors were pushed open again, and Danzo entered with a cold expression.

"You still want him to join my squad? This is no joking matter."

"Didn't you always believe that ninja need to experience battle? Why have you changed your mind now?" Sarutobi Hiruzen took a puff of smoke and said with a smile.

"He is too important. For his safety..."

"For his safety, he needs to go out and gain experience! Toru already possesses strength close to that of a Special Jonin! If he does not go on missions at this level, then when will he? During wartime?"

"But if other countries learn of him..."

"The news will not spread that quickly! It will take them at least several years to find out! This period is the best opportunity for Toru to grow. If he does not gain experience and his strength is insufficient, he will be in even greater danger later!"

Danzo fell silent for a while. "All right, I understand."

Sarutobi Hiruzen also let out a sigh of relief. "Danzo, I'm counting on you."

Under the setting sun, at the Training Ground.

The forgotten Jiraiya: "Is anyone there?! Come save me!"

One week later, in the laboratory.

"Hmm, Orochimaru increased by 83%, Hatake Sakumo by 82%, Teacher Danzo by 37%, Uncle Hiruzen by 42%... So these are everyone's Chakra growth rates?" Sarutobi Toru muttered thoughtfully.

"Why am I last?!" Tsunade sat beside him in a chair, looking unhappy as she complained quietly.

Sarutobi Toru could not help laughing and comforted her. "Because you're different, Tsunade!"

Tsunade's face reddened slightly. Turning away, she said, "What are you talking about? You're lying to me again."

Sarutobi Toru picked up Tsunade's examination report. I'm not lying to you. As a member of the Senju Clan, your potential far surpasses everyone else's!

For Tsunade, the person he valued most and who also possessed the greatest potential, Sarutobi Toru naturally had to devise the most perfect plan to enhance her.

Several hours later.

"The others all took theirs orally, right? Why do I have to get an injection?" Tsunade asked timidly as she looked at the syringe.

"I told you already, Tsunade, you're different from the others. Your potential far exceeds theirs, so naturally you need a more advanced formula!" Seeing Tsunade's expression, Sarutobi Toru nearly laughed. Who would have thought that Tsunade, a ninja, was afraid of injections?

Tsunade gritted her teeth. "Do it!" With that, she held out her arm.

Sarutobi Toru reached out and grasped Tsunade's arm, pushing the medicine into her vein. While she was nervous, his fingernail pierced the skin of her arm.

In an instant, Sarutobi Toru activated his Fruit ability and sensed every hormone within Tsunade's body, gaining the ability to manipulate those hormones at will. Moreover, this manipulation was a permanent alteration.

Previously, Sarutobi Toru had not directly used Hormone Manipulation. Instead, he had added something extra to the medicines to prevent others from noticing anything. After all, the effects of his ability had already exceeded the limits of the medicine itself.

But Tsunade was different. As an heir of the Senju Clan, no matter how effective the medicine was, it could be attributed to her physique. People in this world bought that sort of explanation easily anyway.

A moment later, Tsunade fell into a deep sleep. Sarutobi Toru carried her to the laboratory sofa and covered her with a blanket.

Tsunade felt as though she had had a wonderful dream. Her entire body was warm as she slowly opened her eyes, only to see Jiraiya's idiotic face.

Boom! Jiraiya screamed as he was sent flying a great distance, crashing outside the room's door.

Only then did Tsunade notice that the room was full of people: Sarutobi Toru, Orochimaru, Hiruko, Hokage Sarutobi Hiruzen, and an elderly red-haired woman—her grandmother, Uzumaki Mito. Electrodes, detectors, and other devices were attached to her body.

"You're awake?"

"It's fine. I already said this was normal, there's nothing to worry about! This medicine was custom-made for Tsunade. How could anything possibly go wrong?"

As he spoke to Uzumaki Mito and Sarutobi Hiruzen, Sarutobi Toru removed the detectors from Tsunade's body.

"What happened?" Tsunade asked in confusion.

"You've been unconscious for two days!" Uzumaki Mito said to Tsunade, glaring at Sarutobi Toru.

Sarutobi Toru could only smile bitterly. Tsunade, who possessed the hereditary genes of a Sage Body, had enormous potential within her. After her endocrine system had been reorganized, the time it took for her body to adjust itself had far exceeded his expectations.

However, that also proved that the benefits Tsunade had gained this time were probably astonishing.

"Tsunade, how do you feel now?" After receiving Uzumaki Mito's glare, Sarutobi Toru hurried to change the subject.

"I feel... better than ever before!" Chakra surged through her body, nearly ten times what it had been before she fell asleep. Her body was filled with strength, and even the world seemed clearer somehow.