Months

When Yue returned to the royal palace from the depths of the earth, Sara was fretting over a pile of dilapidated city reconstruction reports on her desk.

Although Anrokuzan was dead, the puppet industrial system of Rōran had completely collapsed along with him.

Without those tireless machines, the people of Rōran, long accustomed to being "kept" and enslaved, found that even the most basic necessities like drinking water and food had become a major problem in the arid, barren desert.

If the survival issue was not resolved, the tragic ending from the original story—where Rōran became a dead city and Sara led the survivors into a life of wandering—would still repeat itself under the influence of this powerful "World Correction Force."

"Are you worrying about how to feed those tens of thousands of mouths, Your Majesty?"

Yue walked to the desk and casually flipped through a few pages of parchment.

"Lord Yue..." Sara stood up in a hurry, her expression dim, "Anrokuzan destroyed the surface oases, and the groundwater was also contaminated by the previous battle. If we don't use the Dragon Vein to power the water-pumping puppets, we won't last more than a month."

"I have said that the power of the Dragon Vein belongs to me from now on; it is strictly forbidden for anyone to touch it again."

Yue's voice was beyond question, but immediately after, he pulled a thick stack of blueprints from his black robe and slapped them onto the desk in front of Sara with a thud.

"However, as a reward for you offering up the Dragon Vein, I also promised that I would let your people live a good life. I, Yue Uchiha, always keep my word."

Sara picked up the blueprints in confusion and was instantly stunned.

What was drawn on them was not any kind of puppet construction she had ever seen, but rather extremely sophisticated mechanical structures and architectural sketches that she could not understand at all.

"This is..."

"Wind-Powered Water Pumping Stations, Deep Soil-less Drip Irrigation Agricultural Systems, Solar Power Stations, and some basic structural diagrams for tools."

Yue Uchiha pointed at the blueprints, a confident smile curling at the corners of his mouth.

As a transmigrator from modern Earth, although he had mostly forgotten the physics, chemistry, and basic engineering knowledge he had learned during his nine years of compulsory education and university, the Sharingan's ability to excavate memories was still incredibly profound.

In this ninja world where the technology tree was extremely distorted—possessing radios and display screens yet still relying on cold weapons and primitive agriculture—these modern basic technologies from another world were nothing short of a dimensional strike.

"We don't need to exploit that dangerous Dragon Vein, nor do we need to sacrifice human lives to fill the assembly lines. The desert has no shortage of strong winds and scorching sun. I will teach you how to utilize pure 'natural laws' instead of 'chakra' to obtain energy."

Yue looked at the dumbfounded Sara, his eyes flashing with the light of ambition.

"I will take ten years to transform your people from slaves into engineers and scholars. I am going to turn this city of Rōran into a Steel Oasis that does not rely on ninjas at all, nor is it controlled by the Five Great Nations."

"It will be my future defense against... never mind."

Sara did not know what this man had been through, nor did she know why his mind was filled with such god-like wisdom.

She only knew that Rōran needed this right now.

"I understand, Lord Yue." Sara stepped back, placed her right hand over her chest, and performed a deep, royal-level salute.

"For Rōran."

Time flew by, and a few months passed easily.

The wheels of history continued to grind forward mercilessly in the main timeline, and the Third Shinobi World War came to an end amidst blood and fire.

Stepping over the corpses of countless enemies and boasting illustrious military achievements, Minato Namikaze donned the Hokage Cloak representing the highest power in Konoha, just as he had wished, becoming the Fourth Hokage.

After he took office, the Anbu's search order for the S-rank missing-nin Yue Uchiha was never revoked.

Minato even personally sent Anbu elites to search the desert of the Land of Wind several times, but they were blocked by the vast, swirling yellow sands that seemed to possess a consciousness of their own, as well as the sophisticated concealment barrier on the outskirts of Rōran, eventually returning empty-handed.

Meanwhile, the technology of Rōran was rapidly iterating.

The engineers of Rōran were not weak to begin with; to be able to build such magnificent tower wonders and complex puppet assembly lines in the ninja world, their craftsmanship and mechanical talent had to be exquisite.

All they lacked was an inexhaustible energy source like the Dragon Vein and the right direction to guide them.

Although the current energy system was not as violent or infinite as the Dragon Vein, it was no longer a problem to sustain the basic operations of the city for a year or two.

Beyond energy, some applied technologies also developed rapidly.

Prototypes of simple internal combustion engines, greenhouse agriculture with soil-less cultivation, and more efficient groundwater circulation systems...

It could be said that Yue Uchiha had completely fulfilled his promise to the people of Rōran to "improve their quality of life."

Except for periodically delivering those epoch-making applied technology blueprints to Sara, Yue Uchiha spent the rest of his time like a ghost, buried deep in a top-secret underground laboratory, conducting in-depth research on the Dragon Vein.

With the initial concept and a hypothesis proposed, what followed was endless experimental research.

And on this long and unknown path of scientific exploration, Yue Uchiha possessed an ultimate cheat that the entire ninja world, and even Orochimaru, could not reach.

The Yagokoro Omoikane in his left eye could alter probabilities through ocular power.

Even without using his ocular power, he could still know the probability of success for any given action.

Only a research geek would know how heaven-defying this ability was.

It could directly avoid those routes that were impossible from the start and extract the routes with higher probabilities.

In the dim underground laboratory, a faint, fluorescent blue light flickered.

"Hiss—"

Yue Uchiha, wearing a white protective lab coat, stood before a transparent vessel covered in complex sealing formulas. Inside the vessel, a wisp of purple Dragon Vein energy, extracted with extreme caution, was slamming against the inner walls like a violent viper.

"The volatility of natural energy exceeds expectations. If it is introduced directly into human meridians, the probability of 'petrification' is 99.99%."

Yue looked at the experimental records in his hand, his brows locked in a deep frown.

The essence of science is trial and error, but when it comes to researching the Dragon Vein—a violent energy capable of distorting space and time—every "error" could potentially result in the laboratory being reduced to ashes.

If one were to follow standard experimental procedures, even Orochimaru would need decades to fully grasp the chakra frequency of the Dragon Vein.

But Yue did not need that long.

Endless ocular power poured into the research of the Dragon Vein, causing his vision to blur more and more, yet the progress of the experiment accelerated just as rapidly.

"Since conventional chakra ratios cannot neutralize it... then I shall attempt to resonate with it using extreme high-frequency gravitational waves."

Yue set down his pen and slowly raised his head.

The black pupils in his eye sockets instantly transformed into the scarlet Mangekyō Sharingan.

The die-like Star Array within his left eye began to rotate slowly.

"If I compress this wisp of Dragon Vein energy at my current chakra output frequency, what is the probability of triggering a micro-spacetime collapse?"

As his ocular power was slightly consumed, a cold number surfaced in Yue's intuition: 0.7%.

This was a success rate so low it was almost negligible, meaning that if he acted now, he would most likely trigger an explosion that would shatter the vessel before him.

Yet, the corners of Yue Uchiha's mouth beneath his mask curled into a curve of madness.

"As long as it is not zero, that is enough."

"Snap!"

A crisp sound of snapping fingers echoed through the quiet laboratory.

"Yagokoro Omoikane!"

"Maintain the gravity I am currently controlling within the exact range of gravitational modulation capable of causing spacetime distortion for the Dragon Vein."

The Mangekyō in his left eye spun frantically, forcibly turning the wheel of causality to crudely pull that 0.7% sliver of probability up to an absolute 100%!

"Hum—!"

Inside the vessel, the originally manic purple energy, under the pressure of the faint gravitational field released by Yue's right eye, Amenominakanushi, did not explode; instead, it eerily achieved a perfect frequency resonance!

The purple light rapidly retracted, eventually collapsing in the center of the vessel into a "black dot" no larger than a needle tip, yet radiating an extremely profound spatial fluctuation.

"Success... This is the critical frequency of the Dragon Vein that triggers spacetime distortion!"