Naruto: Chronicles of A Fire Ninja

The rogue ninja lying in front of Kaida was feeling terror, as would any being who thought they wouldn't be tortured for secrets in Konoha, but later found themselves on the table of an unknown doctor who was, for some reason, preparing for operation.

He was shuddering, shivering at the thought of what was about to happen next, but then his attention was drawn to the doctor in front of him.

"Those merchants you ordered your bandits to loot and kill also felt the same fear when, even after giving all their belongings to you, they were still killed. Those villagers you terrorized for food and shelter also felt fear like that. Now, how are you feeling to be on the receiving end of that fear?"

The bandit wanted to speak, wanted to plead that he would never do it again, but his mouth was sealed with tape and he couldn't make even the slightest sound.

"Don't worry, I am not some messiah of justice. I also want to use you like you used them, just not for my pleasure but for something important. But in a sense, we both are the same," the doctor turned to face the bandit, who was now cursing his luck for ever leaving his village to live like a king among normal people.

But those thoughts halted when he looked toward the doctor in front of him—his red eyes glowing with a beautiful pattern in them, a pattern of spiraling flower which, on closer look, appeared like spiraling circular blades.

Before he could fully appreciate the beauty of those eyes, he found himself in an unknown location, where fire surrounded him, ready to burn him to ash. He quickly used his chakra to save himself from the burn, which actually worked and stopped the burning sensation, but the moment he lowered his chakra even by a little amount, the sensation returned.

While the bandit was working hard to save his life, Kaida's eyes stopped spinning.

"Even though we both are the same, I am not going to kill anyone senselessly unless required, so don't worry. I will try my best to make sure you survive this, though I can't say whether that's good for you or not," Kaida said, but the bandit couldn't hear it since he was busy saving his life in some hell-like place.

Kaida, seemingly unperturbed by this, removed the shirt of the bandit. With precision that would put machines to shame, he wiped off the body, leaving no dust or hair behind. Now the body in front of him was ready for the operation.

Kaida took out a pen, and his Mangekyo Sharingan worked a little harder, showing the exact pathway of the chakra in the body—something that only Byakugan could do. Even three-tomoe Sharingan could just see the outline of chakra in the body when a technique or jutsu was used, but Mangekyo was different, almost achieving the perfect form of Dojutsu of Gods.

With precision, Kaida drew the pathway on the surface of the body using medical ink for reference. Then he followed his notes to mark out the areas where the pathway had to be operated on for the patients.

.

Normally when the ninja is at fourth stage, the most damage is done to the area near the heart and solar plexus, both being the most delicate areas. That's why someone at Tsunade's level was best to operate for a 99 percent chance of success.

Kaida marked those locations on the ninja's body, his mind becoming completely clear. For the next step, the chakra pathway had to be targeted last; first, the area near the infected joints had to be operated on and cleared of any infection. Kaida cut open the ninja's body, which didn't even make him flinch because of the anesthetics that reduced pain, and the rest was handled by the genjutsu he was under, reducing the brain's pain-sensing capacity.

In the next few minutes, Kaida operated on the area near the marked locations, removing small portions of flesh from around the chakra pathway, which was healthy for bandits but would be infected and slightly dark in ninja suffering from Chakritis.

After operating on the areas, Kaida closed the ninja's body and used an advanced version of the healing palm jutsu to close the wounds. Normally, it's recommended to let the body heal itself with minimal treatment to avoid strain, but in this case, it had to be healed quickly before the infection spread again.

After just a few minutes, the ninja was as good as new, with no signs of the operation remaining. Now came the main part of the operation. The chakra in Kaida's body started moving in specific pathways, and his hands began forming one hand sign after another.

In the next second, his hand was covered in blue chakra, with only his fingers pointing out, a blade as small as a needle's point formed—an advanced application of the chakra scalpel jutsu. With his hand moving slowly and precisely, he methodically cut a single chakra vein at two points and removed it using chakra while using his own chakra as a medium for chakra to travel—an absurdly insane task that was the epitome of chakra control testing.

Even with the help of Mangekyo Sharingan, which normally provided a huge boost to his already high chakra control, Kaida was struggling with the task. That's why this operation was normally performed with the help of many chief medical ninja.

After removing one vein, he brought the two ends together, stretching them slightly before joining them. He repeated this task multiple times until all the veins near the heart's tenketsu point were completely new. The only remaining task was to completely purify the tenketsu point, which was relatively easy as he just had to revolve his yang chakra in that point multiple times, and then the operation was complete.

It could be considered a success since the ninja could still use chakra, even though he would feel some strain for a while. Was it perfect? Not by any chance. The amount and level of stretching the chakra veins had undergone was more than necessary, and his speed wasn't fast enough, causing small bumps to be visible on the veins. Normally there would be no problem, but when using advanced jutsu, the ninja would feel the effects, facing delays of a few milliseconds, which could be detrimental in large-scale battles. Still, for a first operation, it was a success.

Since Kaida was done with him, he turned to the clone who had been taking notes and reading from start to end. The clone understood what to do and quickly took the ninja to the Hokage building while Kaida went through the notes, adding points on how to improve further.

While the ninja was being transported to the Hokage building where captured ninja had to be transferred, the clone said, "Please don't make him use any chakra for a few days. He just went through surgery and will face irreversible damage if he uses any chakra."

By now the captured ninja was out of the genjutsu and thanking god to be still alive with all his limbs and organs intact, only to feel dread once again when he found himself in Konoha's T&I department.

For the first time, that department received such an absurd request from a ninja delivering a captive—also a captive so cooperative they had to bring in a Yamanaka to read his memories to ensure he wasn't planning something bigger. They didn't know that the bandit was now thinking of leaving everything behind and becoming a normal farmer, if he could survive this whole scenario.