Warlock Invasion of Naruto.

"It seems I have to do something," Bai Yu thought to himself.

"Nabatsuki, I have a meeting later. You and Shiraha go back first, we'll have dinner together tonight, remember to invite Kushina too!" Tsunade stopped fooling around with her brother and said seriously.

"Okay, sister."

......

High-end restaurant.

Shiraha, Kushina, and Tsunade arrived early, and the dishes were already being served, but Nawaki hadn't arrived yet.

"That Nawaki guy, honestly! Where did he go? Why isn't he here yet!"

Tsunade looked at the bottle of sake in front of her, a hint of barely suppressed urge in her eyes. She couldn't drink while fighting on the front lines, and she was about to burst with pent-up desire.

Bai Yu was also a little confused. He went to find Kushina, and Nawaki should have come to the restaurant first.

After waiting a while, footsteps came from outside the door.

Bai Yu sensed that the energy particles in the air had become more active.

Bai Yu's eyes changed slightly as his "sixth sense" was activated.

At that moment, the door was opened, and there stood Nawaki with a grin, next to a young man dressed in a black kimono.

He had long, black, flowing hair, slightly pale skin, a thin face, and narrow eyes with black eyeliner and purple eyeshadow. His pupils were eerie, vertical golden pupils, and he wore blue and green tomoe-shaped earrings.

"Orochimaru? What brings you here!" Tsunade exclaimed in surprise.

Upon hearing this, Orochimaru's expressionless face revealed a hint of helplessness.

With a broad smile, Nawaki pushed Orochimaru into the room. "I went to great lengths to call Orochimaru-sensei here, just in case you get drunk and cause a scene later. We won't be able to stop you!"

"You wretched brat! What did you say?!" Tsunade's face turned red with anger, as if she had been hit where it hurt.

Orochimaru's lips curled slightly as he sat down next to Tsunade.

As for Nawaki, since Shiraha and Kushina were sitting together, he sat alone on one side.

At this moment, Bai Yu was a little confused. Was this still the Orochimaru from the original work who stabbed the Third Hokage and then Tsunade with a sword?

In my first time watching Naruto, Orochimaru was definitely a standard villain. He could peel off people's faces, swallow scrolls whole, and change his body at will. He was a monster, giving people only a sinister and terrifying feeling.

However, the Orochimaru in front of him, although he seemed a bit cold, was undoubtedly a normal person.

Seemingly noticing Bai Yu's gaze, Orochimaru tilted his head slightly and glanced at him.

"You must be Lord Orochimaru! My name is Yagami Shiroha." Shiroha straightened up and said respectfully, a typical fanboy's reaction.

Orochimaru nodded, and surprisingly, a faint smile appeared on his face.

"Bai Yu is my student in the medical class, and he has excellent grades. He also likes to dabble in some strange and unusual research, which is similar to you."

Tsunade added two sentences.

"The one next to me is Kushina, my younger sister."

Orochimaru was slightly taken aback, glanced at Kushina, and had never heard of Tsunade having a younger sister.

"Hello, Lord Orochimaru, my name is Kushina Uzumaki," Kushina said respectfully.

swirl!

Orochimaru realized what was happening.

Because Orochimaru was a man of few words, the atmosphere at the dinner table remained tense. Halfway through the meal, Tsunade, who had already drunk several bottles of alcohol, suddenly slapped Orochimaru hard on the back and shouted:

"Orochimaru, you're too cold-hearted. You've made these kids too afraid to speak."

"..." Orochimaru looked at Tsunade, who had started acting crazy while drunk, and a slightly embarrassed expression appeared on his face.

"Let's go! We'll go first!" Tsunade stood up.

"Sister, I think you're just not satisfied with the alcohol here!" Rope Tree complained.

After Tsunade was exposed, she quickly left with Orochimaru.

Bai Yu watched with great interest as Orochimaru, who wanted to resist but looked helpless, was dragged away by Tsunade.

What exactly happened that led Orochimaru to break with Konoha, kill his teacher, the Third Hokage, and then turn on his two good friends, Jiraiya and Tsunade?

Of course, more interested in Orochimaru's body than in his boredom was Shiraha's physical appearance.

To advance to the third-class apprentice level, Kushina and Tsunade's cells can be reused, but one more is still needed.

Orochimaru is a very good candidate, but it will probably not be easy to get cells from him.

Fortunately, he was still quite a distance from becoming a third-class apprentice, so he could take his time to plan.

10132192

[Chapter 18. The Laboratory Promise with Tsunade]

Konoha Hospital.

The medical training course is next to the laboratory and offices.

At this moment, Shiraha was seeking advice from Tsunade in her office.

Since the war has come to an end, Tsunade will stay in the village unless a new major battle breaks out or there is any important mission.

As a medical expert, Tsunade would visit the hospital even when she wasn't on a mission.

Tsunade placed great importance on the training of medical ninjas, and the establishment of medical training courses was the result of her repeated efforts.

During the war, too many wounded died due to the lack of timely medical care.

As the most outstanding student in this year's medical class, Bai Yu satisfied Tsunade in every aspect.

"Tsunade-sensei, I've always had a question for you. Under normal circumstances, how long can cells survive outside the body, and to what extent can medical ninjutsu affect cells?"

Bai Yu appeared eager for knowledge and humbly seeking instruction.

In terms of medical knowledge alone, Bai Yu believed he was not much worse than Tsunade, because in his previous life he had also specialized in pharmacology and often conducted many pharmaceutical experiments with his mentor.

However, in the ninja world, Shiraha knew that his ability to use chakra for medical purposes was far inferior to Tsunade's.

Chakra has many amazing properties.

In the original work, Orochimaru was even able to research the Reincarnation Technique, an alternative 'art of immortality'.

Furthermore, there is the Impure World Reincarnation technique, which can actually revive the dead, something that is beyond Bai Yu's comprehension.

Even in the wizarding world, Bai Yu only knew that high-level wizards had long lifespans and various life-saving abilities, but he had never heard of the ability to resurrect the dead.

Bai Yu has not yet conducted systematic research on the properties of chakra, or the differences between human cells in the Naruto world and those in his previous life.

It's not that he's not interested.

On the contrary, wizards are professionals who enjoy exploring the unknown, and Bai Yu has a great curiosity about chakra.

He planned to first reach the level of a third-class apprentice, or even a first-class sorcerer, before slowly engaging in scientific research.

Preserving your life is the most important thing right now.

His main reason for asking Tsunade questions was to obtain Tsunade's cells.

"Have you already become interested in cell-related research?"

Tsunade looked at the "Advanced Knowledge of Medical Ninjas" in Shiraha's hand with a surprised expression.

She also participated in the writing of this textbook, so she naturally knew how difficult the content was; it was a level of knowledge that no newcomer could understand.

However, if it were Bai Yu, she could understand.

This kid is a genius!

“I observed the treatment process of Minami-senpai and the others last time, and I have some feelings about the ‘healing and regeneration technique’.”

This technique uses a part of the injured person's body as a medium to change the proportion of cells in that medium in order to heal the wound.

Treatment requires surgical techniques and demands extremely high control over chakra and cell ratios.

Theoretically speaking, if cell activity is strong enough, wouldn't it be possible to reattach even severed limbs?

Bai Yu asked with a curious expression.

Upon hearing this, Tsunade opened a drawer in her desk, pulled out a book, found specific case records, and showed them to Bai Yu. She then explained:

"Generally speaking, the survival of cells outside the body depends on the specific cell type."

If we disregard the living environment and simply follow the laboratory environment, providing cells with the best possible living conditions.

Highly differentiated, non-replicable cells, such as nerve cells and cardiomyocytes, will generally die after being removed from the body for more than a few dozen hours because they cannot be replicated and renewed.

Stem cells with replication capabilities can survive longer, about three to five months.

The time will vary depending on the growth characteristics of different cells.

This is the result of current research on the cells of most people.

However, there are some special individuals among ninjas whose cellular activity cannot be described by ordinary standards.

Given the current level of medical ninjutsu, it's certain that severed limbs cannot be reattached.

unless......"

"Unless what?!" Bai Yu looked like a curious child.

Tsunade hesitated for a moment, considering Shiraha's medical skills and that he would find out about these things sooner or later, and then explained:

"Unless your cell activity is like my grandfather's!"

"The First Hokage?!" Bai Yu exclaimed.

Tsunade nodded: "Grandpa has been dead for more than ten years, but his cells are still alive and highly active, able to engulf other cells and continuously replicate and strengthen themselves."

Even those with lower activity levels surpassed all the ninjas of Konoha.

Bai Yu's heart skipped a beat. So, the first-generation cells were similar to cancer cells, possessing a similar characteristic of unlimited replication.

No wonder the First Hokage is hailed as the God of Shinobi in textbooks!

According to the plot of the first part, Orochimaru used the Impure World Reincarnation technique to summon the First and Second Hokage, but the two of them were defeated by the elderly Third Hokage when they joined forces. He thought that the Third Hokage was too strong and the First and Second Hokage were too weak.

It now appears that the problem lies with the forbidden technique of Impure World Reincarnation itself.