Genjutsu: Reality, Domain Expansion

"The Genjutsu team... is enough."

"Second Hokage, you only need to tell me—if we follow your plan and fuse a pair of Genjutsu Large Mangekyo, what level of power would it possess?"

Tobirama Senju was silent for a moment, then spoke in an extremely serious tone—

"If successful, its power... will far exceed the limits of an ordinary Mangekyo."

"It might even change the rules of this world."

"If my pupil power is replenished sufficiently, I don't think it might be any worse than Madara's eyes!"

Uchiha Jun smiled.

"What are we waiting for? Let's get started!"

For the next two days, the entire Sky Fortress entered a state of maximum intensity operation.

Uchiha Jun mobilized all available resources and put all the captured prisoners from Kusagakure and Hoshigakure into clone cultivation.

--5.7 billion taels.

This is the total cost of the project.

When Orochimaru saw the bill, even he, a man who had seen the world, couldn't help but gasp.

"Five billion... Chun Jun, isn't that a bit too extravagant?"

"This is equivalent to five years' worth of Konoha's tax revenue."

"It doesn't matter. If we can't spend it, it's just a pile of waste paper." Uchiha Jun changing his expression. "Besides, have you forgotten about the three 'blood packs' from the Land of Water, the Land of Earth, and the Land of Wind?"

"I'm going to rob them in a few days."

Orochimaru: "..."

Hiruko nearby, cautiously interjected, "Um... boss, are you sure you want to do this? What if it fails...?"

"Failure is failure. At least this failure will add experience to our great cause, and the 5.7 billion will not have been wasted."

Uchiha Jun interrupted him, his tone calm yet carrying an undeniable confidence. "Everyone, adjust your state. This fusion is probably the most costly experiment our organization has ever conducted since its inception."

"..."

Hiruko silent.

Looking at this young man who was many years younger than her, she felt a complex mix of emotions.

"What a... terrifying genius," Hiruko thought to himself.

The cloning process is proceeding at full speed.

Uchiha Jun personally oversaw the quality of each batch of clones, ensuring that the awakening conditions and Dōjutsu of all Mangekyo met expectations.

Meanwhile, Orochimaru and Tobirama Senju began preparing for their fusion experiment.

"According to the Second Hokage's plan, we need to first cultivate enough [Tsukuyomi] and [Amaterasu] type Mangekyo, and then fuse them using White Zetsu Cells."

Orochimaru said this while flipping through the experiment plan.

"In terms of quantity, Chunjun has already provided twenty pairs of standard Mangekyo, and including the batches currently being cultivated, there are a total of more than twenty pairs available."

"In terms of consumption, fusing one Large Mangekyo requires approximately fifteen pairs of the same type of Mangekyo."

Tobirama Senju nodded. "Then let's experiment with the [Tsukuyomi] form first. If it succeeds, we'll move on to the [Amaterasu] form."

"Good."

The experiment began.

Sky Fortress, three underground levels, experimental subject processing area.

The air was filled with the pungent smell of disinfectant, mixed with a faint odor of blood, which instinctively made people feel uncomfortable.

The walls on both sides of the corridor were inlaid with sealing runes, emitting a faint blue light that made the entire corridor look like a Ghost Domain.

Tobirama Senju stood at the entrance of a huge laboratory, staring blankly at the scene before him.

In the laboratory, dozens of culture tanks were neatly arranged, each containing a human body.

These are all specially made Uchiha Clan that will be used to awaken the Mangekyō Sharingan.

After special genetic regulation, Tobirama Senju learned from Orochimaru that after these clones suffered intense emotional stimulation, only two Dōjutsu, [Tsukuyomi] and [Amaterasu], could be awakened.

However, not only is the cost much higher than that of clones with greater power, but the failure rate also increases dramatically.

It's all about spending a fortune to customize the Dōjutsu; the cost of just these dozens of clones alone is over three billion.

"Second Hokage, this way please." Orochimaru, dressed in a white lab coat, walked up to Tobirama Senju.

Tobirama Senju didn't speak, but simply nodded silently and followed Orochimaru into the laboratory.

After walking through several corridors, they arrived at a larger laboratory.

In the center of this laboratory stands a huge circular platform, covered with intricate sealing formations and runes.

Around the platform stood several people— Uchiha Jun, Uchiha Hikari, and Yakushi Nonō, who served as his deputy.

"You've arrived." Uchiha Jun turned to look at Tobirama Senju, a smile playing on his lips. "Perfect, let me show you how the Mangekyo is mass-produced."

"What are you going to do next?" Tobirama Senju walked to the edge of the platform and looked at Uchiha Jun with great interest.

Speaking of which, he also planned to see how this Mangekyo was mass-produced.

"Extract the soul."

Uchiha Jun stretched out his hand and waved it.

In an instant, the wall on one side of the laboratory slowly opened, revealing a huge iron cage.

Inside the iron cage were more than a dozen people—they wore tattered clothes, their hands and feet were bound by chains, and their eyes were filled with fear and despair.

These were the treacherous ninjas from the Kusagakure and Hoshigakure that had been wiped out by Uchiha Jun not long ago.

"These people are all ninjas from Kusagakure and Hoshigakure."

Uchiha Jun walked to the iron cage, his gaze calmly fixed on the terrified faces. "They're all a bunch of scoundrels. Of course, this isn't enough to generate enough emotional power to awaken the Mangekyo. This is just the first batch."

Uchiha Jun reached out and covered the head of a ninja.

The next moment, the ninja's body trembled violently as he struggled desperately, grabbing his neck with both hands, trying to break free from that invisible force, but all his efforts were in vain.

The power of [Human Path] has been activated.

Uchiha Jun loosely clenched his right hand, and an invisible suction force emanated from his palm, enveloping the ninja.

The ninja's body began to tremble violently, and then a wisp of white, translucent mist slowly drifted out from the top of his head and gathered in Uchiha Jun's palm.

--soul.

A materialized soul!

Tobirama Senju's pupils suddenly contracted.

He had come into contact with forbidden techniques involving the soul before. Whether in the Warring States Period period or the ninja village era, there were many ninjas in the Shinobi World who had mastered forbidden techniques involving the soul.

He had personally experienced things like the Spirit Transformation Technique, which could materialize the soul and fly thousands of miles away from the body to kill the target.

But he had never seen anything like it—a person, alive and well, having their soul ripped out.

Such methods are simply outrageous.

'Is it the power of the Mangekyo?'

Tobirama Senju thought to himself, while his gaze became even more focused on Uchiha Jun's hand movements.

Uchiha Jun condensed a ball of white light in his palm and crudely inserted it into a clone's body.

The ninja whose soul had been extracted lost his support and collapsed to the ground like a rag doll. His body was still twitching slightly, but he was no longer alive.

Uchiha Jun reached out again, this time targeting another ninja inside the iron cage.

The same process is playing out again.

One after another, ninjas from Kusagakure and Hoshigakure had their souls extracted by Uchiha Jun, collapsing in iron cages.

In less than two minutes, the dozen or so people inside the iron cage were all empty shells.

That's about it.

"Next, it all depends on the light."

After transferring his entire soul into the clone's body, Uchiha Jun looked at Uchiha Hikari beside him.

Uchiha Hikari had been waiting by her side the whole time. Her expression was calm, and her eyes were expressionless. She nodded.

--Limited Tsukuyomi

The next moment, Uchiha Hikari's Mangekyou Mangekyō Sharingan began to spin rapidly.

An invisible Genjutsu power surged into the cultivation device and was injected into the clone's body.

The clone's body shuddered suddenly, then began to tremble violently, as if it were experiencing immense pain.

"Limited Tsukuyomi can create a virtual world," Uchiha Jun explained as he walked to Tobirama Senju's side.

"In that world, the souls within these clones will endure endless suffering—... every detail has been meticulously designed to maximize the stimulation of their emotions."

Tobirama Senju remained silent, merely gazing at the clone within the cultivation device with a complex expression.

The clone's body trembled more and more violently, fine beads of blood began to seep from its skin, its eyes were tightly closed, and the muscles on its face were contorted into a painful expression.

Suddenly, he opened his eyes wide.

Those were a pair of scarlet Sharingan — Mitsudomoe —slowly rotating in the pupils.

But the next second, the pattern on those eyes began to change, the Mitsudomoe slowly merging to form a completely new pattern— the Mangekyō Sharingan.

"It's a success." Uchiha Jun's voice carried a hint of satisfaction.

Uchiha Hikari didn't stop; she continued to activate the Limited Tsukuyomi, channeling its power into the next cultivation device.

The second clone, too, went through intense pain and struggle before finally opening its Mangekyō Sharingan.

The third, the fourth, the fifth...

One after another, the clones in the cultivation device, under the catalysis of the Limited Tsukuyomi, awakened the Mangekyō Sharingan.

The patterns on those eyes are all different; some look like windmills, some like Shuriken, some like flowers, some like Uzumaki Clan... Each pair is a unique Mangekyo.

However, their specific Dōjutsu are all uniform.

Tobirama Senju stood to the side, watching this scene. His expression changed from initial shock to complex emotions.

This was the first time he had ever seen Mangekyo created in this way.

It wasn't through fighting, hatred, or the pain of losing loved ones, but through a... artificial, programmed method, mass-produced.

Like a toy to be played with at will, it's utterly inhumane. Even a master of forbidden techniques like him had some doubts about Uchiha Jun's humanity.

Tobirama Senju didn't speak; he simply stared at the pairs of scarlet Mangekyō Sharingan in the cultivation devices.

"Alright, Nonō, take out all the Mangekyo. Also, check how many clones failed to catalyze."

"Yes!"

Yakushi Nonō nodded, picked up the instrument, and began to extract the Mangekyō Sharingan and place it in a special solution for preservation.

Seeing that Uchiha Hikari's eye power was being used up too much, Uchiha Jun switched to the Shimura Danzō template and spoke up.

"Light, drain my eye power. Next time, just drain it directly. I'll be fine."

"... Hmm." Uchiha Hikari nodded. After sensing the change in Uchiha Jun's eye power, he began to use the Yachihoko to draw eye power from Uchiha Jun to replenish himself.

Before long, Yakushi Nonō completed the entire extraction process and summary, placing a total of seven pairs of Mangekyō Sharingan on the table beside her. Yakushi Nonō then handed a report to Uchiha Jun and began her presentation.

"This spawning project involved fourteen captured ninjas from Kusagakure and Hoshigakure, along with fourteen clones, all with standard Mangekyo serial numbers WT-001 to WT-014."

"Among them, seven clones completed soul fusion and emotional catalysis, and the initial success rate of opening their eyes was... fifty percent."

Upon hearing the words "one hundred percent," Uchiha Jun's brow twitched slightly, and he nodded.

"Yes, have you collected all the data reports? Orochimaru, use this data to adjust the genes of the third and fourth batches of clones to increase the success rate, aiming to reach 60%."

"No problem, Chunjun."

"Let's proceed with the second batch of catalysis, Second Hokage. You can take these seven pairs of Mangekyo for research."

With that, Uchiha Jun pointed to the seven pairs of Mangekyo on the table and addressed Orochimaru and Tobirama Senju.

"Um."

The two, carrying the documents and the Mangekyo, turned and headed towards the laboratory.

On the first day, Tobirama Senju and Orochimaru spent a full twelve hours in the laboratory, completing the initial fusion of the first batch of five pairs of [Tsukuyomi] type Mangekyo.

The integration process did not go smoothly.

The proportion of White Zetsu Cells, the balance of pupillary power, the rejection reaction between Mangekyo... every aspect requires repeated adjustments and constant corrections.

To achieve this, the two even scrapped ten pairs of Mangekyo.

If word gets out, the Uchiha Clan in Konoha will probably be moved to tears.

It wasn't until the early hours of the next day that Tobirama Senju finally found the optimal ratio.

"Chakra output is stable."

"Pupil power integration rate has reached 97%."

"The rejection reaction has been largely eliminated."

"We can proceed to the next stage."

As Orochimaru finished speaking, everyone held their breath.

On the experimental table, the ten Mangekyou Mangekyo containing the [Tsukuyomi] Dōjutsu began to slowly fuse, enveloped by White Zetsu Cells.

A scarlet light burst forth in the laboratory, and a blood-like, viscous aura flowed through the air, creating a suffocating sense of oppression.

Uchiha Jun stood to the side, watching the scene unfold before him, a hint of excitement flashing in his eyes.

The Large Mangekyo... is finally taking shape.

While it can't compare to the Giant Tenseigan, it has the advantage of being an existing fighting force, unlike the Giant Tenseigan which requires a lot of Byakugan and time to develop.

Yes.

Through research and observation, Uchiha Jun and Orochimaru discovered that even with Byakugan Giant Tenseigan, the Giant Tenseigan still required time to integrate the power of these Byakugan.

This mechanism seems to involve underlying logic, and changing it would be no less difficult than creating a new, Giant Tenseigan from scratch.

This is one of the reasons why Uchiha Jun was so determined to push forward with the Giant Mangekyo Project.

Another day and night passed.

When Uchiha Jun stepped into the laboratory again with the second batch of Mangekyō Sharingan, the scene before him stunned him.

In the center of the experimental table, a huge eyeball, as large as an adult's head, was suspended.

Its surface is covered with dense scarlet lines, each line flowing slowly and radiating a chilling aura.

And in the very center of the eyeball is a giant Mangekyo pattern—

The pattern is symmetrical and sickle-shaped, but the lines are magnified dozens of times, and the pattern has become much deeper, as if it can devour all light.

"We succeeded." Tobirama Senju's voice was hoarse, but his tone was filled with undisguised excitement.

"[Tsukuyomi] type Large Mangekyo, fusion complete."

Uchiha Jun slowly walked to the experimental table, reached out, and gently touched the enormous eyeball.

The instant his fingertips touched the surface of the eyeball—

An immense, suffocating power of vision surged into his body like a raging tide.

Countless images flashed through his mind instantly—

Tsukuyomi World.

A world completely under his control.

There, he is God.

Uchiha Jun slowly closed his eyes, feeling the power flowing through his body.

A moment later, he opened his eyes, a satisfied smile curving his lips.

"Good."

"It's even stronger than I imagined."

The next moment, Uchiha Jun Hand Seals, and the Large Mangekyō Sharingan power.

"Bang--"

It was accompanied by a sound like a heartbeat.

A crimson light exploded throughout the laboratory.

The patterns on the Mangekyō Sharingan spun wildly, and the three sharp, blade-like patterns gradually merged into one, transforming into a strange yet complete ring.

Within the ring, ripple-like patterns spread outwards and converge towards the center, like a pupil gazing into an abyss.

--Tsukuyomi ·Reality!

The air in the laboratory suddenly became viscous.

Orochimaru instinctively took a half step back, keenly sensing that the surrounding space was undergoing some inexplicable change.

It wasn't the physical fluctuations of Chakra, but something more fundamental, as if the very rules of the world were being rewritten.

"It's begun..." Tobirama Senju himself confidently, his eyes glued to the observation screen.

The data started fluctuating wildly.

The first thing to change was the light source.

Under the influence of Uchiha Jun's eye power, the row of constantly lit white fluorescent lights on the laboratory ceiling began to distort—the light emitted from the tubes no longer traveled in a straight line, but instead meandered and curved in the air like flowing water, forming streaks of silvery-white light that floated in mid-air.

Upon witnessing this scene that defied the laws of physics, Orochimaru's pupils constricted sharply.

"Light has been redefined..."

After thinking for a moment, Orochimaru tentatively reached out and touched one of the arcs of light. He felt a warm sensation on his fingertips—it wasn't light, but something solidified into a form that was somewhere between energy and matter.

Next comes the ground.

Centered on Uchiha Jun's feet, a semi-transparent silver-gray pattern began to spread outwards from the alloy floor.

Those patterns grew and spread like living things, climbing the walls, climbing the lab bench, climbing the ceiling—wherever they passed, the colors of the real world were stripped away layer by layer, replaced by a dreamlike silver-gray tone that did not belong to this world.

Before long, a semi-transparent spherical field, about the size of a football field in radius, was forcibly expanded in the laboratory.

Within this domain, Uchiha Jun's will is the law.

Immediately afterwards, Orochimaru, who was within the Uchiha Jun Tsukuyomi Domain, discovered that his position was rapidly shifting—no, to be precise, he discovered that he could choose where to stand.

The spatial coordinates within the domain appear to have been completely reconstructed.

One second he was in front of the observation platform, the next he realized that he could appear anywhere in the field if he wanted to—not by moving, but by directly defining his position in space.

"Interesting..." Orochimaru licked his lips, his eyes gleaming with a fanatical academic light. "Even spatial perception has been interfered with. This isn't a five-sense Genjutsu; this is... a sixth-sense level reality rewriting!"

"Is this the power of Large Mangekyo?! No wonder you, Chunjun, were willing to invest such a huge amount of resources!"

"Such power can probably only be possessed by the legendary Sage of Six Paths!"

After his initial reflection, Orochimaru turned his head to look at the petri dish on the lab table.

The petri dish originally contained three live cell samples that had just been extracted from the clone.

Under the domain's coverage, those cells began to divide, proliferate, and differentiate at a speed visible to the naked eye—they had been implanted with the pure will's definition of "growth" and were evolving at a rate dozens of times faster than normal.

"Even biological processes are within your control..." Orochimaru's voice trembled slightly—the tremor of a scholar facing an unknown truth.

"Chakra simulation? No, this isn't the result of Chakra catalysis—you've skipped the biochemical reactions and defined 'these cells should divide' from the ground up."

Uchiha Jun stood in the center of the domain, the Mangekyo patterns in his eyes spinning wildly.

He could sense that within this territory, he could do anything—

Make flames burn in water, solidify air into walls, reverse gravity, and even slow down or speed up time in a localized area.

It is not Genjutsu, because its impact on the real world is real; nor is it Ninjutsu in the physical sense, because it skips all intermediate processes and acts directly on the level of rules.

It is, in fact, the fused and enhanced version of Tsukuyomi – reality.

An Genjutsu space independent of the real world.

This is the power of this Large Mangekyo: it no longer pulls people into illusions, but pulls illusions into reality, using its power to redraw a new picture of rules and landscapes on the canvas of the real world!