Demon King Who Will Rule the Infinite Worlds

"So this is Byakugan," Primo stood on the roof the house, his golden hair swaying with the wind. His emerald eyes gazed at the darkness on the palm of his hand, the white-eye blinking inside the darkness on his palm. The veins on the edges of his eyes stretched as he focused.

A three sixty degree vision came to him. His vision was so clear, it felt like he was inside that house, able to see everything.

'So, this is Byakugan (3),' he thought to himself as he gazed around. He could see the bodies he had buried underground, hunting Root Anbu. Danzo had too much power, and he was troublesome to deal with. Ever since he awakened the ability in his right eye, he had been using it to reduce the number of Roon Anbu.

He let the Byakugan disappear along with the eye, "I have to take a break," in the future, he'd have to go for missions or for war. He planned to be erratic in his cleaning, taking long breaks. He didn't want to leave a pattern that would be easily broken if he left for a mission.

He guessed how long it would take for his Sharigan to reach Rank 5, but that was when he could meet with about 2 Uchiha women per day. In Hyuuga's case, it would be longer.

'Either way. It's going to take years,' he started disappearing, seeing Third Hokage's Anbu come closer to the scene of a fight, 'For now. I'll silently destroy Danzo's power so the Uchiha family can live in peace before he destroys that peace.'

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Since Enma awakened, he tried to stay away from the centre of the village. If it was the first month he came here, he would never do this. But recently, he had been gaining more attention, likely because he came into contact with Kushina.

He knew that Mikoto and Hayami were protected, being the wives of future Clan Heads for the big families. It didn't make sense to him since the heirs were thrown into the battlefield to prove themselves, 'if they die, what are they going to do with these women? Could it be...Kushina is the true target of their protection?'

He hadn't met her before, but when he placed Demonic Aura inside of her, it was destroyed by a violent chakra. He wanted to get his hands on it. He had been trying to construct a character with the powers of these Kekkei Genkai, and he had a feeling the source of the chakra could help him complete his character Enma, 'Once that happens. I would have enough power to gain influence over the political sphere. But before that, I need to achieve a saintly status so my reputation can't be tarnished by Danzo. He doesn't seem the type to play fair.'

That's the reason he had to go to the centre of the village, and meet the Third Hokage himself, "you want to use your merit to gain Tsunade's Medical Jutsu?"

"Yes, Lord Third," Enma knelt in front of him, keeping his head lowered, "as you know. I have caught a strange disease that Doctor's can't cure or even diagnose."

Hiruzen leaned forward, his elbows on the table.

"I heard," Hiruzen Sarutobi nodded, taking a puff of smoke from the pipe, sharply looking at Enma. He had seen the reports, it was a strange black patch that appeared in his lungs and spread outward. It was incurable. He wasn't sure if Tsunade could cure it if she was here.

"I heard Lord First possessed healing powers that allowed him to heal through any injury without even making hand signs, and Lady Tsunade created Medical Ninjutsu to duplicate it. I believe her Medical Ninjutsu is the answer I am searching for. If only I could heal the organs after safely taking them out, it is possible to survive. Not just for me, for anyone who suffers through similar ailments."

Third Hokage sighed, "that would be ideal Ninjutsu. It's impossible to achieve. It is a great achievement that you managed to achieve this much in the medical field in a few months. It takes people years to do that, maybe...if you had more time..."

"I should be able to slow it down if I have her research. At least, let me try?" Enma requested him. He used Abyss Aura to create an illusion of disease, to get the village off his back and pacify the Uchiha Family. If it was real medicine like his world, then it would have taken much longer. But as long as it was related to energy, he could write the code and program his own body to perform that Ninjutsu, 'if only I had Scarlet Comedy with me. I could achieve it with a single order. Right now, I can only do it with constant training and practice.'

'All I have to do is write a code, connect it with the prompt command (name of the Jutsu) and I can achieve what they do with hand signs. They use hand signs as a code to program their body and chakra to follow a certain path. Since I have a better aptitude in Coding, I can do it much faster than by training.'

"That is true," Third Hokage nodded, closing his eyes as he thought. After much thought on the matter, he asked, "why did you approach Kushina?"

"She's an Uzumaki, they are known for their life force. I wished to study the Uzumaki Blood. I already have my guesses. Her blood has a higher concentration of Yang Chakra, which grants her the life force. I also wanted to study the difference between Senju Blood and Uzumaki Blood. What is the difference between the Yang of Uzumaki and Yang of Senju? If I could gain the answer to that, maybe I will know why was Lord First different. How was his Yang Chakra different from the Uzumaki and even the Senju."

"Difference between their Yang Chakra..." Third Hokage had a complicated look on his face. He didn't expect Enma to answer so honestly, and after hearing it, 'It is intriguing. Lord First was in a league of his own. Is it related to Yang Chakra? After Five Main Elements, I haven't been able to touch Yin and Yang.'

He took another pull from the pipe. Before the meeting, he was suspicious of the young boy, mainly because of Danzo, but after meeting him, 'he's not like the other Uchiha. Calm, collected. Even in the face of death, he isn't desperate or forceful. He proved himself first and then asked through the official channel. Is it pride? Honour? There were different ways of getting his hand on the research.'

'But if I reject him...'

"It's alright Lord Third. No one in the family knows that I am here to plead this of you," Enma spoke out of his turn.

Hiruzen puffed out the smoke, 'even if I refuse...he doesn't want the family to blame the village...I can't give Uchiha family Tsunade's research. Then again, Tsunade has created a new village, she even made a school where she is distributing her knowledge. what if...people here start going to that village?'

'It wouldn't be hard since Lord Hashirama's granddaughter is the one who created the village, wanting to follow his ideal of not sending children out in war. For some, going to her might not even be a betrayal of Konoha...I need to put a stop to it,' Third Hokage nodded, "Very well. I'll grant you all the research. On that note, I'll give you a mission too. While studying, teach medical ninjas. Though the village might not be able to provide you with a proper budget."

'Want to squeeze out Uchiha Family,' Enma had a thought what he meant by that, 'wait...doesn't this...'

He hesitated, "Lord Third. Would you mind if I take candidates from the families that have Kekkei Genkai or Rare Inherited Jutsu? Such as the Hyūga for their eyes that would allow them to see the source of injury. Yamanaka and Nara, since their family Jutsu are Yin Chakra based, Aburame, if their insects could be trained to absorb chakra and use healing chakra. If I am going to train student, I wish to train a variety to see whose medical Ninjutsu can be most proficient."

'He has a bright head. If it weren't for the war...if Tsunade hadn't left...he might have made a great student for her,' Third Hokage nodded, "I'll try to ask them. It's on you to find them."

"Also, Lord Third, allow Lady Kushina to learn medical ninjutsu from me."

"It's impossible," Third Hokage rejected that request. He cleared his throat, "I mean, she's too hot headed. She's not good at studying. She's not made for it."

"I heard about it from Miss Mikoto. I also heard that Uzumaki Family used to be experts in sealing jutsu. I have another idea which could involve healing jutsu and sealing jutsu. It would work perfectly for Lady Kushina."

'I can't reject him right away,' Third Hokage closed his eyes again, "Write a report on this plan of yours. I'll read it and decide."

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A few days later,

"Hah," Third Hokage sighed during the meeting, inviting the attention of his advisors and old friends.

"What's wrong?" Elder Mitokado asked, rubbing his shoulder after working on the plans for the next few days along with Utatane, Danzo and Hiruzen.

"It's the Uchiha kid," Third Hokage looked at the scroll in front of him.

"Which one? Enma?" Danzo became interested in this talk. He had been kept tabs on the boy. Knowing that he was about to die, Danzo let him go. He gave him a suicide mission. He was never supposed to come back. But not only did he not die, he even destroyed the bodies of other Uchiha members in his squad, keeping him from getting hands on their eyes.

Since the traitor was dying, Danzo didn't plan to do anything.

"He asked to teach Kushina medical ninjutsu. Something about being able to teach her despite her not having the aptitude," Third Hokage opened the scroll that Enma submitted, reading his theory.

"You can't!" Danzo stood up, urgently speaking, "He is a dying Uchiha! What if he tries to control the Nine Tails with Sharingan and attack the village!"

"You don't have to be so extreme," Third Hokage tried to ignore Danzo, 'but there is some truth to it. As the Hokage. I can't take the risk.'

He already didn't have any plans to say yes, and most of what was written on the scroll went above his head. But it kept bothered him. He knocked on the table, causing an Anbu to appear in front of him, "Is Minato in the village?"

"He is Lord Third."

"Call him for me."

The Anbu disappeared and Danzo furrowed his brows, "what are you calling him for? Don't tell me you are planning to say yes to that Uchiha kid?"

Utatane gave Hiruzen a disapproving look, "Hiruzen. I don't agree that he would be so extreme, but the other Uchiha might be. They might think of this as their chance to gain more power. We can't allow Nine Tails Jinchuriki anywhere near them."

"I know, I know," Third Hokage was getting impatient. He didn't understand a part of what Enma wrote, but from what he understood, he got an idea what he was trying to do, 'is it possible...?'

He kept reading, waiting for Minato Namikaze, who came along with Jiraiya, "Yo, old man. Didn't you say he's on a vacation? I planned on taking him to Mount Myoboku."

"So soon," the elders were startled, looking towards Minato, who humbly smiled, bowing towards them to greet them.

"I know. I wanted him to read this," Third Hokage passed the scroll, giving it to Minato, who looked at Third in confusion before opening the scroll to read. He remained confused in the starting, but then he started reading with rapt attention.

"I see...haha, he's too close to the problem. He's basically coming a full circle. He wants to use sealing jutsu to perform the jutsu, but that is what we do. We use hand signs to seal the pathways and use the jutsu. Since you asked me to read, it must be about this," Minato placed his eyes on the strange way of writing, "Coding?"

It was written on the top, followed by the writing that corresponded the seals which would perform Jutsu, "I don't understand it either."

"That's why I want you to go and meet him. See if there is any merit to it. Kumogakure's recently have gained a new boost in power. I don't know where it is coming from, they even have a new Jonin, Saeko Busujima, who is leading Sword Users and combining it with Thunder Style Jutsu. They are one of the most deadliest unit of Kumogakure yet."

"Now Tsunade has established a new village. She has been making alliances in that region. I can't reject new ideas," Third Hokage sighed, "Since he asked to teach Kushina. You vet."

"I'll do it."

"Wait, Minato! There are more important things than this! If you learn Sage Jutsu, then new squad of sword users won't mean anything!!" Jiraiya tried to convince him otherwise.

"I know, Sensei," Minato smiled, "it won't take long."

"Jiraiya, give him a day," Third Hokage spoke, "You'll find him at the hospital."

"Wait, then I am coming too," Jiraiya scratched his head, going out with Minato, taking the scroll from him to read, "what is this crap?"

"Sensei, we still don't know if it's crap or not," Minato smiled, carrying a sparkle in his eyes. It was interesting since it was something he didn't know or master when it came to chakra.

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"This is...a book?" Jiraiya and Minato looked at the thick book, then back towards the man with black hair and black eyes, a slightly handsome face.

"You know there are many things we Ninja don't come into contact with since we are encouraged to train. Even things like television, these are all for the normal people. Not for Ninja. Computer is one of them. I found a book like this during the war and I read it to calm my nerves during the war," Enma explained.

"Ok?" Jiraiya suspiciously looked at the boy. He came here to convince Minato that this was a waste of time and best course of action was going to Mount Myoboku to learn Sage Jutsu.

"The computer have an operating system. For ninja's that would be our chakra network, and they have program, which are made up of a code. In our case, Jutsu made of numerous seals."

"Heh, they came up with something like that," Jiraiya tried not to be impressed, but he was, "How does that matter? Not like they can use Jutsu?"

"They can't, but they can run the code," Enma sat down, "there are only so many Ninja and training and exploration takes time. But people can use a computer to write any code what they want, a hundred, thousands of them. I want to know everything about Sealing Jutsus, and rewrite it into a language that corresponds with Coding. Once we Code a Jutsu. All we need to do is use the corresponding seal to recreate that Jutsu," Enma explained to them. For him, who had seen Coding produce Worlds in Virtual Reality, this could change the scope of what Ninja could achieve.

"Hm," Minato placed his finger in front of chin, thinking, "How is that different from Ninja training? It's them making a theoretical Jutsu."

"It's one of those things that's hard to explain. How about this. Do you have any Jutsu scroll at hand?"

"Jutsu Scroll?" Minato looked towards Jiraiya, who sighed in annoyance, taking out a scroll from his Ninja bag, "Careful. This is what my lovely student gave me. It's the first Jutsu he made."

"Sensei, not that one," Minato gave Enma a troubled look. It was the scroll of Rasengan, but it didn't have any seals.

"No, it's alright," Enma didn't have an idea what it was, but whatever it was, was enough. He read through the scroll, while writing a program for it, 'it needs three different programs. Sure is a complicated Jutsu.'

"What are you writing?" Jiraiya leaned to get a glance, seeing a series of lines, he asked in annoyance, "is this gibberish? Don't waste time like this!"

Enma ignored Jiraiya, focusing on the code and writing it in the code. It was a long code because of the repetition and rotation of the chakra. He placed it in front of them, "there are Twelve Hand Signs, which encompass numerous small seals, each having a function. Their job is not to let chakra flow, we pull chakra and use the seals to block the paths we don't want it to go, so it takes that one path that allows us to perform Jutsu."

"That's elementary," Jiraiya scoffed.

"That's the exact method how it would be done," Enma pointed at the code. He never had to beg for anything in his previous life. He was adopted when he was young. His father was rather strict and demanded perfection, which he sought to achieve.

He could do what he wanted to achieve in time, 'I lack time. How should I explain this to them.'

"You know what? How about I show you?" Enma thought of something, "I would have to use my Sharingan on you. If you don't mind."

"I do mind!" Jiraiya pointed at Enma, shocked by his rudeness. He glanced towards Minato, who nodded ever so slightly, "but fine! If it doesn't work, then we are leaving!"

Enma opened his Sharingan, peering into Jiraiya's eyes, planting the code inside his mind, connecting it to his body, "Prompt is Rasengan."

"Huh, is that all?" Jiraiya thought it would be a proper genjutsu, but it wasn't anything like that. He wasn't even sure if he was under a Genjutsu.

"Just repeat the prom, Lord Jiraiya."

"You mean I should say Rasengan?" Jiraiya barely spoke the word when his chakra started losing control. It started moving on its own, forming a Rasengan in his hand, "Woah!!"

He jumped to his feet, staring at the Rasengan forming in his hands, the wind swirling around them, the heaviness on his hand, "this is! How!"

The Rasengan formed and burst apart, disappearing. It surprised Enma, "oh right. I forgot to add the code to maintain it once it's formed. This is a different from Fireball."

"Y-Y-You! How did you learn that just from a glance!" Jiraiya pointed at Enma, stuttering, "I didn't show you! You didn't use Rasengan!"

"If theory was reality..." Enma thoughtfully spoke, "Right. That's the essence of my project. What can be imagined, can be theorised, what can be theorised...can be materialised. Project Reality Script. An Ultimate and Origin of all Jutsu that were and would be."

"You can already do it..." Minato stared at Jiraiya's palm, stunned. He snapped out of it, turning to look at Enma, who nodded.

"I can...but that's because I have learned the language and I have Sharingan," he shrugged, 'I have Abyssal Aura that can dominate and guide chakra exactly as I wish. But for others...'

"I have an instinct. For others. I need to learn everything about seals, which are a basis of hand signs, so I can reconstruct a language to the point where anyone can understand."

"An Ultimate Jutsu that only you can use..." Minato scratched his head, "Why would you even want to do that? That sounds very strong."

"Because I don't have long to live. A few years. I might be able to delay my sickness soon, if everything goes well, but solving it...I can't say. Since I can't do this alone. I will have to ask everyone's help," Enma answered his question with half-truth.

He could sense a huge mass of Aura in the distance. Likely, the Demons were trying to devour this land, and from what he could assume, the Ninja were too weak to counter the Demons, 'As long as I can strengthen them, they could be great shields. Let alone, the Sharingan would be able to use the technique far more easily than the others could. When put into technology, it would take a few decades to develop. By then, I should be able to gain control of Konoha. The Demons...Heaven's Mind...Ninja's. I am going to change the rules here.'

"Someone out there. Has to be able to make a Jutsu that could help me, right?"

"No. It's too dangerous," Jiraiya sharply looked at Enma, "trying to spread a jutsu like that. You are going to throw this world into a dangerous war!"

"Maybe that's what you think now," Enma didn't argue, "while I was in the middle of the war...I came across someone...something. He was too strong. If I had to guess...it was the person behind Senju Village. Once you meet them, you will understand. There is a need for this Jutsu."

"The ones behind Tsunade? You met one of them!" Jiraiya grabbed him by his shoulder, shaking him, "Why didn't you say that?! Do you have a lead!"

"I told you. They are too strong. It won't matter what I say," Enma shook his head, "no one would believe me."

"How strong are they?" Minato carefully asked, "We can't gain any information about them."

"I don't have it either. He is as strong as the First Hokage and Uchiha Madara," Enma lied with a straight face, 'I hope the ruler of Demon isn't an Empress.'

"Absurd! How could they be so strong!" Jiraiya clenched his fist. He didn't want to believe it, 'but only someone so strong could make Tsunade believe that this would work. I need to go see her.'

Jiraiya took a deep breath, "You come with me too."

"Where are we going?" Enma sought an answer from Minato, since Jiraiya didn't seem to be in the mood to answer.

"Mount Myoboku. I think? Right, Sensei?"

"Yeah."