A wounded Konoha ninja, bleeding from injuries sustained in battle, under the cover of comrades, did not wait for medical teams to arrive. Instead, he took a scroll from his tool pouch and activated it.

A soft green chakra light glowed over the wound, and the bleeding stopped rapidly; then the torn wound began to slowly heal.

Although such injuries were not fatal, they were far from minor. Continuing to fight would worsen their injuries under intense movement, turning light injuries into severe ones.

In the past, without Medical Ninjas, such treatment required alcohol disinfection, hemostatic medicine, multiple layers of bandaging, and a series of tedious procedures.

On the battlefield, these steps could only be properly completed during lulls in combat or after retreating to the rear.

But in front of that small scroll, all those complex steps were drastically reduced. Within mere dozens of seconds, initial stabilization and hemostasis were completed.

The appearance of such scrolls quickly caused a huge shock among frontline ninjas.

Although their effect on penetrating wounds or internal organ damage was limited, only barely stopping bleeding and preventing further deterioration, they still bought a small but critical amount of time.

And that tiny amount of time had an undeniable significance on the battlefield.

In corners where Medical Ninjas could not arrive in time, lightly injured ninjas could stabilize themselves and even quickly rejoin battle.

And for severely injured ninjas, where every second could determine life or death, such a scroll, portable and instantly usable, greatly increased survival chances.

News quickly spread from the Village Hidden in the Sand and Village Hidden in the Mist fronts to the rear, and then further to other villages and nations.

After receiving detailed reports on Konoha's new medical scrolls, the leaders of various powers all fell into deep silence and apprehension.

Land of Rivers, the Village Hidden in the Sand, forward base.

In recent days, the Village Hidden in the Sand's frontal assault had noticeably slowed, as higher-ups were preoccupied with more urgent matters.

In a rear field hospital, inside a hastily requisitioned laboratory, a group led by Chiyo, along with elite Medical Ninjas and more than a dozen sealing specialists, worked day and night around an experimental table.

On the table were more than ten medical scrolls captured from the battlefield. These were a small portion collected from fallen Konoha ninjas during recent operations.

Although Chiyo was renowned throughout the Shinobi World as a master of poison, poison and medicine are two sides of the same coin, just as in another timeline, Tsunade's poison could reduce Jiraiya's combat strength without his awareness.

Chiyo, the master of poison techniques, also possessed profound attainment in Medical Ninjutsu, to the extent that she was regarded as the best within the Village Hidden in the Sand.

It was just that her medical skills were far less well-known to the world than her poison techniques.

The laboratory door was gently pushed open.

"Fourth Kazekage-sama!"

"Kazekage-sama!"

Several of the Sunagakure ninja who noticed the visitor quickly put down their work and bowed in respect.

Rasa waved his hand, signaling them not to be so formal, then quietly stood to the side, his gaze falling on the busy figures inside the laboratory.

At this moment, Chiyo was slightly bent over, her fingertips hovering above one of the scrolls, her brows tightly furrowed as she remained silent.

After a moment, as if noticing Rasa's arrival, Chiyo walked over. The moment she approached, Rasa asked: "Elder Chiyo, is it possible to replicate it?"

Chiyo shook her head and said in a low voice: "It's difficult, Rasa."

Hearing this, Rasa was not surprised. He merely nodded, as if he had already expected this answer.

"What are the difficulties? What resources are needed? I can have people mobilize them."

"Three difficulties."

Chiyo picked up a medical scroll, her fingertips lightly brushing across its surface as she spoke: "First, the paper used in the medical scroll itself. The material of this paper is different from any known chakra paper we have. We still cannot determine its exact composition or manufacturing process."

"The only certain thing is that this paper itself contains a special kind of life activity. It is precisely this vitality that allows medical chakra to be stably sealed within it without rapidly decaying."

Hearing this, Rasa said, "According to intelligence from the front lines and information provided by our spies in Konoha, this special paper should have been developed by Shinichi Higashino. It is called Shinichi Paper."

Shinichi Higashino.

Upon hearing this, Chiyo fell silent, and Rasa also felt heavy in his heart.

This Shinichi Higashino was not only talented and powerful, but more importantly, he was extremely versatile; there seemed to be nothing he could not do.

Even something like cooking, which in the eyes of ordinary people had nothing to do with ninja talent, he had brought to the highest level in the Shinobi World.

Moreover, he was extremely difficult to kill.

A few months ago, deep in the Land of Lightning, the Village Hidden in the Cloud's ten-thousand-man army failed to keep him even after surrounding and pursuing him.

Now, even though all the great ninja villages in the world clearly understood the terrifying talent of Shinichi Higashino and that he would inevitably become a fearsome enemy in the future, no one had any truly effective method to eliminate him.

"The second difficulty is the Sealing Jutsu."

Chiyo broke the silence first, pointing at the sealing patterns on the scroll and continuing: "This Sealing Jutsu is not particularly profound or complex, but it is clearly the work of a master. Learning it is actually easy; if someone teaches you directly, you can master it in a few days. But replicating it independently without a teacher is a completely different matter."

"It's like a theorem. Nowadays, people can learn it in a class or two, but if you had to derive it from scratch without any guidance from predecessors, you wouldn't know where to begin. That is the situation we are in now. We can see the finished product and its final structure, but we cannot understand the logic behind each step of its design."

"So, reconstructing the entire origin and framework of this Sealing Jutsu will likely take a very long time."

Rasa slowly nodded, his expression unchanged.

"And the third point, elder?"

Chiyo did not answer immediately.

Her right hand suddenly formed a blue chakra blade and lightly cut her left arm. Blood immediately welled up.

Then she activated a medical scroll.

Under Rasa's gaze, the gentle green glow within the scroll seemed almost alive, automatically flowing toward the wound on her arm.

A moment later, the bleeding stopped, and the edges of the wound began to contract and heal.

Seeing this, Rasa understood her meaning: "Automatic targeting? Automatic healing?"

"It is Yin Healing Wound Destruction," Chiyo said.

"Yin Healing Wound Destruction?"

Rasa frowned slightly and tentatively said:

"That Medical Ninjutsu that allows one to pre-analyze the enemy's attack location and heal in advance, minimizing damage?"

As the fourth Kazekage, he did not understand Medical Ninjutsu deeply, but he had heard of this technique.

However, he had never thought much of it.

If you could already predict where the enemy would strike, why not just dodge? Or simply kill the opponent outright? Why go through unnecessary trouble?