That is, Ootsutsuki Isshiki did not even suspect that the soul of Ootsutsuki Kaguya's son still exists in the Pure Lands, and mistook him for his descendant. Otherwise, he would probably have felt indescribable annoyance if he hadn't become enraged.
In the Ootsutsuki clan, he belonged to the noble main branch, no match for a side slave like Kaguya, who was destined to become a sacrifice for the Divine Tree. And now someone mistook him for the descendant of this insignificant woman—truly, an audacity that knows no bounds!
He developed education, spread the methods of chakra cultivation everywhere, and resolved all kinds of disputes. Even the test subjects used for experiments were now under strict control. Previously, due to the precedent set in the mainstream world, ninjas were used to experimenting on humans and even took them for granted.
— It's for the sake of saving the world! What are you unhappy with if you contribute?
"Just one life! Yes, you died, but your death will bring prosperity to your descendants and save this world! What an honor, what a dignified end!
But now it was impossible. It was impossible to thoughtlessly grab people, because to develop a new way of interdimensional travel and build a spaceship, a huge amount of talent and labor was required. Disorderly experiments led to an unjustified loss of population. But what to do? They needed people to do the research anyway.
And then Ootsutsuki Isshiki decreed that only those whose chakra is scarce, who are weak, who do not shine with intelligence and, best of all, have committed a crime, can be used for experiments. The disorder was put to an end.
Ootsutsuki Isshiki's desire to survive was incredibly strong. He had to survive no matter what!
Time passed, the years passed, and the Dragon Vein remained calm, without the slightest hesitation, as if all their previous guesses were wrong.
However, the passage of time not only did not make them doubt their assumptions, but, on the contrary, strengthened their confidence: in that other world, the Dragon Vein was not absorbed by Uchiha Yue. After all, by continuously collecting and analyzing a huge amount of data, they have already comprehended the principles of its operation to a certain extent.
Moreover, they realized that the space that the Dragon Vein led to hadn't changed at all.
At the same time, the first drawing of the spacecraft was ready. The existence of shadow clones significantly accelerated the learning process — it was possible to create a double, and now two, or even more, were comprehending knowledge at the same time. This has contributed to the emergence of many talents.
Especially for those who lacked chakra, but whose intelligence was outstanding, they developed a new kind of shadow clone: it required a minimum of chakra and created an incredibly fragile doppelganger, who, however, possessed intelligence and the ability to learn. Ninjutsu has even been created to speed up memorization.
Thanks to the efforts of many scientists and the full support of such supernatural energy as the chakra, they were able to create the first spacecraft design in such a short time.
And even Ootsutsuki Isshiki himself took part in it.
Artificial ecosystem, life support system, gravity system, the initial theory of spatial jumps, methods of highly efficient food production and, most importantly, energy source technology. Among all this, the energy system turned out to be the most complex and problematic.
The chakra, this supernatural force, was created from the fusion of the vital and spiritual energy of living beings, and it was extremely difficult to transform other types of energy into it by technical means.
But it was possible. If other types of energy could not be converted into chakra, then why did Uchiha Yue absorb all this kinetic and light energy?
However, with their current technology, it was still impossible to achieve this.
They chose a different path — nuclear energy. Relying on the chakra, this incredible supernatural force inaccessible to ordinary civilizations, they managed to ignite the flame of fusion and entered the atomic age.
They were now able to build fusion reactors to power their machines.
In fact, Ootsutsuki Isshiki had something to say about converting any energy into a chakra. The key was the Divine Tree. Although it could not transform any energy into a chakra, but only natural and vital force, if it were possible to unravel its principle of action, perhaps this would be a step towards creating a technology of complete energy conversion.
However, Ootsutsuki Isshiki was an outsider in the ninja world, an alien harboring evil intentions. He would never give the Divine Tree and the secrets hidden in it to these local savages.
The very existence of the chakra was a mistake. If it hadn't been for the betrayal of Ootsutsuki Kaguya, if her sons hadn't passed on the chakra to these lower beings, none of this would have happened and Uchiha Yue would never have been born. But alas, history did not know the subjunctive mood.
After countless experiments that claimed the lives of at least tens of thousands of people, finally, on this day…
When a human figure appeared on the Dragon Vein, the entire laboratory fell into dead silence.
And the next moment, a deafening roar of jubilation broke out.
— It worked! Ha ha ha!
— We did it! We did it! Ha ha ha!
— A new world! We've finally found a new world! We figured out how to get into it! Ha ha ha!
The researchers standing here looked at this figure with delight and excitement and shouted madly.
How much time has passed… so many that they are already numb, just mechanically changing the parameters and sending volunteers. Disappointment and despair settled in their hearts. All their thoughts were focused on building a spaceship and escaping from this planet. Perhaps the Dragon lived and could not move between different worlds, but only shuttled between two.
What if—and this was even sadder—there were only two parallel worlds in this universe, and there simply weren't any others? There had been too many failures, and more than one of them had had similar thoughts.
Some scientists even thought it was time to give up, coming to the conclusion that there were only two parallel worlds, and continuing the search was just a waste of resources. They suggested blowing up the Dragon Vein, cutting off Uchiha Yue's path to this world, and focusing all their efforts on building a spaceship.
Ootsutsuki Isshiki was even approached with a similar proposal to terminate the project.
But parallel worlds existed, of that Ootsutsuki Isshiki was absolutely certain. He rejected all these offers and continued to support the project. Some have already begun to complain that Mr. Jigen is wasting resources, and the donated people could be more usefully used in the construction of the ship.
After all, the search for other worlds has not yet borne any fruit, while the success in building the ship was evident.