Training Medical Ninjutsu to the Limit

"Katsuki, what are you planning to do next?"

Sitting on a park bench, Duan watched with a smile as Nawaki played with Shizune in the sandpit, and then asked.

"What am I doing? Hmm? Probably cultivating! Besides cultivating, I also like reading, but unfortunately there aren't many interesting books to read."

Katsuki sighed. He was genuinely disappointed because the Shinobi World had a very weak cultural atmosphere due to the endless wars. Konoha's library was already one of the best libraries in the Shinobi World, but it didn't have many books, and even fewer that could be considered interesting.

"I didn't ask you that." Duan's lips twitched. What was this all about? "I meant that you're already Special Jonin, and I estimate that you'll be promoted to Jonin directly after the next mission. Have you thought about where you want to go? The Anbu? The Border Defense Force? Or maybe you'll stay in the Jonin Commander?"

"······"

Katsuki stared wide-eyed at Dan.

"Does this mean we can choose for ourselves?"

"Of course, Jonin are a valuable asset to the village. Even the Lord Hokage wouldn't mistreat a Jonin. Each newly Jonin will be assigned a position based on their personal wishes, plus the review of the Elder Council." Dan explained carefully. "Generally speaking, aside from those truly unsuitable cases, Jonin enter the departments they want to join. Now that you're a prospective Jonin, you should start thinking about these things..."

Duan left with Shizune, and Nawaki went home to reflect on the results of today's exchange. Katsuki sat alone on a park bench until the sky was ablaze with the color of sunset.

Jonin!

Jonin is not only a symbol of strength and status, but also carries corresponding responsibilities. His body trembled slightly as Katsuki looked down at his fair hands. Unconsciously, he was no longer the weak and powerless brat he once was. He had gained the strength to stand on his own and the possibility of surviving in this chaotic world.

"Bring it on! Madara Uchiha or Black Zetsu, let's see who's stronger."

Outside the village, deep in the forest of an unnamed mountain.

A hundred or so identical red-haired, black-clad youths appeared in every corner of the forest, and the sound of thunder echoed through the Yamanaka in broad daylight.

"This is probably the maximum size a wild boar can grow, right?"

"No, no, no, don't forget the Toad of Mount Myōboku. If Toad can grow that big, wild boars might grow even bigger!"

The giant wild boar, over ten meters long, the former overlord of the forest, lay down helplessly, its mouth wrapped up as it grunted incessantly. A circle of Katsuki's clones stood around its massive body.

"Bang!"

The wild boar, which had been quiet, suddenly kicked out with its hind legs, instantly obliterating one of its clones standing beside it.

"**! You lot, get to work right now!"

Standing on a branch of a large tree, Katsuki felt the sensation of being kicked by a wild boar transmitted back by his Shadow Clone. He was extremely annoyed. His Shadow Clone were truly bizarre. They were supposed to be training in Medical Ninjutsu, but these bastards were chatting away, so relaxed that they couldn't even dodge the boar's kick. It was a disgrace!

"Okay, okay," the clones replied unhappily.

"Pfft! Pfft! Pfft!"

Kunai, long swords, short swords, Eight Gates —a motley crew of weapons were unleashed, and in the blink of an eye, the giant boar was hacked to pieces, a faint red mist filling the air.

"Let's do it!"

"Work has started! Work has started!"

The clones dropped their weapons, took two steps forward, placed their palms on the different wounds on the wild boar, and began to heal the wounds using their not-so-skilled Mystical Palm Technique.

Standing on the big tree, through the crooked branches, you can see unlucky creatures like black bears and wild deer not far away, being knocked down like wild boars. A group of clones are practicing Medical Ninjutsu around their prey. Further away, by the river, there are about a hundred clones, each with a fish of different sizes, beating them half to death before practicing Medical Ninjutsu.

Occasionally, a clone that was miscontrolled would disappear with a bang due to the shockwave generated by the Chakra.

"Hey, hey, hey, come quick! Someone come help! This deer has lost too much blood!"

"They're here! They're here!"

New Shadow Clone quickly filled the gap.

A gentle breeze blew by, carrying with it the pungent smell of blood through the mountains and forests.

The main body of the Katsuki sat on a protruding tree root, comprehending the Medical Ninjutsu training insights that the clones were constantly returning to him, with green Chakra shimmering like mist in his palm.

"Chakra atomization... preserves its most original nature, without transforming into any other attribute... stimulates cell activation..."

"Is it still consuming the recipient's own life force? No, no... that's not right..."

"It shouldn't be this simple; what other purpose does it serve?"

Information about Medical Ninjutsu flashed through his mind. In order to study Medical Ninjutsu, Katsuki not only turned his own family's related books upside down, but also went to the Senju Clan Konoha Library Shadow Clone books, and returned with a full load of books because of Nawaki's help.

"Cell activation, stimulating cell activation, that's definitely not enough. Is there anything else I've overlooked?" Katsuki muttered to herself, racking her brains.

Historically, aside from the creators, most ninjas have used Ninjutsu in a superficial way, pursuing faster casting speed, greater destructive power, and less Chakra consumption, without seeking a deep understanding of the operating principles of Ninjutsu. Few people bother to delve into the so-called principles: why is this technique the way it is? How does it work?

Not many people care about these issues. This is a chaotic world; just surviving is enough to exhaust people, let alone having the leisure and energy to do research.

Katsuki has always learned Ninjutsu in a similar haphazard way, mastering the hand seals and then practicing diligently, relying on her talent and intuition to master a technique. The results of this approach are not bad; in fact, she does a very good job relying on her intuition.

"Earth Release, Rock Rods."

Square rock sticks rose from the ground, all the same thickness and length, arranged neatly in front of Katsuki. He didn't know the activation principle of the Rock Rods, but simply created these sticks based on his intuition.

Just like an experienced driver who doesn't know how to build a car, but that doesn't stop him from drifting on a five-turn hairpin bend. As long as you know how to use it, you don't need to understand every detail of how the car is made. The principle is the same. Ninjas only need to know how to use Ninjutsu. As for the principles, knowing them doesn't necessarily make any difference.

If it weren't for Katsuki's desire to better develop the Hito Hito no Mi, he wouldn't have bothered to analyze the working principles of Medical Ninjutsu.