Attack

Medical ninjutsu could not be perfected in a day or two, but fortunately, with Seimei's research capabilities, everything progressed smoothly. Many things from the documents could be put into practice. Ruri accompanied Seimei for three days of human experimentation, and after perfecting the basics, he found a genin with precise chakra control to assist, while he himself went to handle official business.

It was said that the genin's mental fortitude was too poor; his hands would shake during research, making it impossible to proceed. In the end, Seimei forced him to eat and sleep alongside the corpses until he overcame his psychological issues. Scientists are truly ruthless people.

Two months had passed since the human experiments began, and on this day, Ruri received a message from Seimei: the development of the medical ninjutsu had reached its final stage.

"This is... a Chakra Scalpel?" Ruri exclaimed, looking at the scalpel formed from chakra in the genin's hand. The Chakra Scalpel required extremely high chakra control; anyone capable of this could be called an elite! Not to mention, this was a ninjutsu that had appeared ahead of its time!

[Name: Seiryu]
[Overall Strength: Chunin]
[Talent: Genin]
[Attribute: Water]
[Special Ability: Medical Ninjutsu]
[Evaluation: Excellent chakra control, yet limited talent.]

Compared to two months ago, Seiryu's system panel now included medical ninjutsu, and his overall strength had risen from genin to chunin.

"Seiryu's control is quite good. I cultivated him a little, and now his chakra reserves should also be at the chunin level," Seimei said. To be able to cultivate a ninja with only genin-level talent into a chunin in just two months—even with the bonus of medical ninjutsu—still showed that his teaching ability was extraordinary!

"Hmm, he will follow you from now on," Ruri said, letting him go without hesitation. In any case, he had already sent many people to guard this secret base, and giving Seimei a chunin wouldn't cause any trouble, not to mention that Amaterasu was still sealed within him.

"Thank you, Takikage-sama. Seiryu, continue." Seimei pointed to the corpse on the experimental table, signaling Seiryu to continue.

Seiryu nodded, used the Chakra Scalpel to slice open the corpse's abdomen, and then reached inside. A green light emitted, and a heart was extracted just like that.

"This is..."

"A medical ninjutsu capable of extracting injured organs or toxins. As long as it is replaced or treated within the time limit, it can be restored to its original state. It is a ninjutsu perfected by adding chakra to the concepts found in the documents, called the Cellular Extraction Jutsu." Seimei placed the organized documents in front of Ruri and spoke.

Ruri silently reviewed the documents. It seemed that predecessors had also researched medical ninjutsu, though it likely wasn't true medical ninjutsu, but rather simple dissection and human experimentation.

The Cellular Extraction Jutsu was a medical ninjutsu that existed in the original work; it seemed the creator of this technique had likely obtained these documents from somewhere as well.

After Seiryu used the technique to extract the heart, he did not stop; he used the Chakra Scalpel to cut the heart into two halves!

Next, Seiryu joined the two halves of the heart together, and the chakra in his hands began to stimulate the heart cells to divide. The separated heart actually grew back together bit by bit, and due to the chakra stimulation, it even began to recover its hematopoietic function and slowly started to beat!

Seiryu used the Cellular Extraction Jutsu to place the heart back, and after a few seconds, the corpse on the experimental table let out a heart-wrenching scream!

However, just as it was about to make a sound, Seimei, quick as a flash, used a scalpel to cut its throat.

"This technique can be used in the field now, right?" Ruri asked after watching.

"That's correct. This is the twenty-seventh experiment, and not a single abnormal reaction has occurred," Seimei replied. To be able to develop a never-before-seen medical ninjutsu in just two months, even with the help of predecessors' documents, still marked him as a person of exceptional talent.

"Proceed with Kakuzu's treatment. Record these techniques and hand them over to the medical team to study." Ruri was not one to hoard knowledge. If he wanted to develop Takigakure and reduce casualties in the village, the popularization of medical ninjutsu was necessary; it was beneficial for both ninjas and ordinary villagers.

"Yes." Seimei hesitated for a moment before agreeing. Although he had researched it, compared to ninja tools, medical ninjutsu was at best a hobby. With his life in someone else's hands, he had to bow his head; he did not yet have the power to resist Ruri.

Just as Ruri was reviewing the research data recorded over the past few months, he suddenly felt a tremor.

The secret base was located underground directly behind the Takikage building. It was impossible for an ordinary person to appear here; unless there was an earthquake or someone had used a large-scale ninjutsu above, there was no way the experiments inside could be disturbed.

"It's bad, Takikage-sama!" A ninja wearing a hood broke the seal of the secret base and rushed in.

"Takiichi, what happened outside?" After his trip to the Land of Artisans, Ruri had deployed a small number of Anbu ninjas. Except for using hoods instead of masks, they were no different from the Konoha Anbu. Ruri felt that hoods were better than masks; hiding one's hairstyle helped conceal one's identity. Someone with silver hair like Kakashi would have their identity revealed in minutes—it was practically an open unit.

Takiichi had followed Ruri since before Takigakure was built and was an absolutely loyal subordinate. He had previously been responsible for the liaison between Takigakure and the Black Market Exchange, and recently he had been in charge of monitoring the secret base.

However, this was Takiichi's first time entering the secret base. Even seeing the corpse on the experimental table, he did not show any panic. As a Takigakure Anbu and the most loyal follower of the Takikage, he only needed to obey Ruri's orders; he didn't need to ask or think about anything else. Even seeing forbidden human experiments, he wouldn't say a word.

"A giant fortress has flown over the village. There seem to be people on the fortress, and they are attacking us. Takiji and Takisan have already taken people to evacuate the villagers, but we don't have enough manpower. Please, Takikage-sama, come out and command the battle."

"A giant fortress flew over?" Ruri was stunned upon hearing this, thinking of the Sky Ninjas.

At this time, the Land of Sky had not yet been destroyed. It was located at the border between the Land of Wind and the Land of Fire, with the Land of Rain above and the Land of River below. It occupied a large amount of land but never interacted with the outside world, being even more self-isolated than the Land of Iron. This was also why, during the Six Kage Summit, Ruri had proposed that the Land of Wind dig a canal from the Land of Rain to divert water, while remaining silent about the Land of Sky and the Land of River. From the daimyo down to the commoners, the Land of Sky was extremely hostile to outsiders.

Having been in the Naruto world for over twenty years, he didn't remember many things clearly. Ruri tried hard to recall, but in the map of the original work, there was no Land of Sky at all. The territory belonging to the Land of Sky was carved up by the Land of Rain, the Land of River, the Land of Fire, and the Land of Wind. Seizing territory was likely the main reason for Konoha's destruction of the Sky Ninja Village.

In the original work, the survivors of the Sky Ninjas in Naruto's era tried to revive the Sky Ninja Village, resurrected the Zero-Tails, and activated the Angkor Fortress that could fly. But if that giant fortress flying over was really the Angkor Fortress controlled by the Sky Ninjas, why would they attack Takigakure?

Full of confusion, Ruri left Seimei in the secret base and took Seiryu to the surface. Without ninja tools, Seimei couldn't exert much combat power, and it would be a loss if he were killed in the crossfire without protection. Seiryu, however, having learned medical ninjutsu, would be very useful; in the air-to-ground strike just now, people must have been injured. With the Sky Ninjas attacking, this was likely going to be a bitter battle.