It is normal for Orochimaru to guess some of Natsuo's secrets.
Natsuo's story was so legendary that his strange strength improvements from spending time with women could not be explained by his natural talent alone.
And honestly, Natsuo didn't believe that Orochimaru could guess the existence of the system, since even Teuchi didn't notice any abnormalities in Natsuo.
But even if Natsuo mentioned the existence of the system, what did it matter?
Of course, Natsuo wouldn't openly brag about that. He simply tacitly accepted Orochimaru's theory.
However, Orochimaru's ideas were something Natsuo could consider.
Although honestly, Natsuo wouldn't dare try something with another man or another scandalous theory, but artificial reproduction...
Might be worth a try!
After a time of scientific research, Orochimaru and Natsuo came to the conclusion that children born through artificial reproduction were not recognized by 'the Mangekyo technique' (System). Only children conceived through biological reproduction between Natsuo, and a woman were recognized.
During these three years, the technology of the Shinobi World also advanced by leaps and bounds.
Although it did not become an interstellar civilization in the full sense of the word. At least stable transportation was developed to colonize the Moon without having to resort to space passage. In addition, outer space near the Shinobi World began to be explored in search of more planets and resources.
Also during this period of time, Uchiha Madara managed to reawaken the Rinnegan, and from time to time used the Tengai Shinsei to attract massive meteorites and made them land in the ocean.
Then the Family Reunion of the Uchiha clan sold the mining rights of those meteorites to the different powers on the shinobi continent.
Many minerals were extracted, new metals and even some minerals with high energy value such as the meteorite used by ancient Hoshigakure.
A number of industries were established thanks to these massive meteorites.
The abundance of these mining resources had directly reduced the cost of living for the inhabitants of the shinobi continent, improving their quality of life and increasing their income...
It really was a source of great benefits.
On the other hand, because Natsuo improved his way of life with the chakra fruit, as well as with the constant strengthening of his wives. During the three years that passed, the rewards he obtained from his children were quite generous. He obtained all types of Shinjutsu, and the evaluation of his children's potential was always greater than 200 points.
Of course, the most talented child was the one he had with Kaguya.
[Offspring +1, the comprehensive potential evaluation is 381, you get Chakra +35, Shinjutsu: Primordial Bond]
Shinjutsu: Primordial Bond is a chakra-based technique of the highest level, used by Otsutsuki Shibai to enslave the God Trees. Thanks to this technique, Natsuo was able to free Isshiki's God Tree and formed an equal bond with his bloodline.
He later gave the God Tree the Human-Human Fruit which allowed it to take on human form. Unfortunately she did not become a woman and Natsuo abandoned the idea of having a child with the lineage of a Divine Tree. The God Tree took on a form similar to Isshiki, Natsuo assumed this was because the God Tree had devoured Isshiki previously. The God Tree in his new human form called itself Shinkamino, and Natsuo took him to Teuchi to take care of him.
This action also allowed the last restrictions that prevented Teuchi from helping Natsuo to be removed.
That is why when Natsuo noticed that the system was consuming part of Hinata's Fate while she was pregnant, he asked Teuchi for help so that he could channel the greatest amount of Fate energy into Hinata.
And although Hinata's child was not the child of Natsuo with the greatest potential, it did give him the best reward.
[Offspring +1, the comprehensive potential evaluation is 281, you get Chakra +25, Cosmic Gate.]
According to the system description, the Cosmic Gate is the means to explore the void and, if you have the coordinates of a universe, it is possible to travel there. The void is defined as the realm beyond the limits of the universe, and to move between universes, it is necessary to traverse it. The operation of the Cosmic Gate requires significant energy resources. Furthermore, the energy of the Origin of the Universe is absolutely crucial to accessing the Void Realm.
"A door to other Universes? No wonder she's the female protagonist of the Naruto world! Now I understand why the system consumed so much Fate Energy!" Natsuo thought deeply.
After finishing understanding how the Cosmic Gate worked, Natsuo immediately decided to try it. He mobilized the resources of the Uchiha clan to gather various high-level energy sources and make various preparations before beginning to operate the Cosmic Gate. Although he doesn't know if he could obtain results without the coordinates of another Universe, he still decided to try.
...
Land of Fire, Secret Base of the Uchiha clan.
Formations of technical formulas, kanji, and detailed, complex graphics dotted the four walls.
"These formations are attracting natural energy! It seems that I have seen something similar in my inherited memory…" Shinkamino let out a cry of surprise, as he entered with Teuchi into the central chamber of the Secret Base.
"Just based on the meticulous preparation, one could tell the complex and terrifying nature of the cosmic gate mentioned by Natsuo…" Teuchi sighed. His eyes couldn't help but look at the center of the room.
In the center, a large area of starlight was emitting bright rays. The inside seemed to contain something, but it couldn't be seen clearly.
At that moment Natsuo was near the center of the room, where several circles of Fuinjutsu radiated a golden glow. "This is the physical state of the cosmic gate. Simply opening one greatly depleted the accumulated energy resources of the Uchiha clan, if it weren't for the fact that I technically control the entire Shinobi World, it would have bankrupted me…"
"The operating time of a cosmic gate is very valuable. First I will program it at its lowest limit, which will allow us to pass spatial coordinate markers. I'll need your help with the next thing Teuchi." Natsuo's voice echoed.
"Okay. I'll start channeling some of the Origin Energy." Teuchi's eyes radiated a faint golden glow as he formed a golden crystal in his hand and then threw it towards the blue flame at the center.
[Boom!]
The golden crystal collided with the blue flames and a violent reaction instantly occurred. A large amount of golden light radiated out, which was immediately absorbed by the blue flames. Then a kind of mercury mirror formed in the center with black waves radiating from its center.
"This feeling! It is quite similar to the energy released during teleportation, but it possesses a greater degree of disorder and violence..." Shinkamino reflected in a low voice.
"Get ready Natsuo, now I will channel the energy of Fate towards you." Teuchi reminded Natsuo.
"Alright." Natsuo quickly formed a cocoon with his chakra. Fuinjutsu marks appeared on its surface and when they disappeared it took on a silver tone. Natsuo then threw it into the mirror.
Natsuo began to explain. "Space-time positioning is extremely simple. With the repeated release of these cocoons we could stumble upon a different universe. Generally speaking, the probability is extremely low and there may not even be a single case of success in ten thousand attempts."
"So, isn't this just trying my luck? Now I understand why you wanted me to channel the Energy of Destiny towards you." Teuchi rolled his eyes and was somewhat speechless.
"Actually this would not be possible if it were not for the collision between universes, causing the distance between them to shorten as time goes by…" Natsuo said as he looked with concentration at the mirror.
At that moment, Natsuo felt that the chakra cocoon entered a turbulent space. After a while the cocoon finally managed to enter the other universe.
The cocoon continued traveling through the universe while searching for a habitable planet, until Natsuo, through his connection with the cocoon, vaguely saw a huge world.
Natsuo estimated that this world was approximately 150 times the size of the Shinobi World.
As the cocoon approached that planet, Natsuo noticed that most of the world's surface is covered by water. In addition, there was a huge red strip of land that divided the world.
Natsuo immediately recognized what world it was...
It's the World of One Piece!
Once the cocoon entered the planet, it dissolved and recorded the coordinates on the Cosmic Gate. When this happened Natsuo lost the connection and could not see where in the One Piece World the exit from the Cosmic Gate was recorded.
As Natsuo withdrew his consciousness, his attention was drawn to the boundaries between the universe and the void. There she saw a thin man floating, with long white hair that reached the small of her back. He wore a worn black robe. His horns curved upward, resembling a crown. He had three eyes, one of which was on his forehead, all of his eyes were closed. Additionally he had a small beard that is divided into five sections covering his chin.
The strangest thing was that there were several golden chains that came out of the void and crossed various parts of his body. The places where the chains had passed through him emanated a purple energy that seemed to be corroding those chains.
The next moment, he turned his head in Natsuo's direction, then the connection was cut off completely.
Natsuo knew immediately that that person was Otsutsuki Shibai.
"Excellent! Thank you Teuchi, although in the end there was an unexpected situation, everything was a success. Now that we have the space-time coordinates we can reach the other universe. This will give us an advantage in the next collision of Universes." Natsuo looked in Teuchi's direction.
"You don't need to thank me, as long as your actions benefit the Universe I will give you all my help." Teuchi responded as he left the room with Natsuo and Shinkamino.
Natsuo smiled in response and then turned to Shinkamino. "Shinkamino, as I promised you, once we reach the other universe it will allow you to absorb enough genetic material as well as vital energy to continue your evolution."
"Also, the planet we will arrive at has a higher level of energy than the planet we are on, and it is very likely that you can use Shinjutsu: Chakra Edible Creation, to create chakra fruits."
As they left the secret base, Natsuo continued talking for a while longer with Teuchi and Shinkamino, before saying goodbye. Natsuo had to prepare for the astronomical consumption of energy that the Cosmic Gate will consume when he decides to establish a stable passage with the other Universe.
…
...
One year later.
One Piece World, Marineford.
Today is a historic day for the world. Perhaps it will be a day that will never be forgotten by the navy, the pirates or even all of humanity.
Today is the public execution of Portgas D. Ace, the commander of the Second Division of the Whitebeard Pirates. Not only that, even the navy will broadcast it through Den-Den Mushi so that everyone can see it.
But the focus of many people is not on Ace's execution, but on the possible great war between the Whitebeard Pirates and the Marines.
Now all naval forces have gathered at Marineford including the Seven Warlords of the Sea as well as the Pacifists.
The three Admirals are already in their respective seats to face this battle. Sengoku, as the Fleet Admiral, stands on the execution platform next to Ace.
"Sengoku-sama! We received reports that the gates of justice opened on their own without any order! Furthermore, we cannot communicate with the control room!" One of the navy officers informed Sengoku in panic.
"What did you say!?" Shouted Sengoku who was very upset with the news he had just heard. He then looked ahead and saw from a distance, one by one, ships that he believed were part of Whitebeard's pirate fleet began to appear. He was shocked and increasingly annoyed by what he was currently seeing.
"How did they suddenly appear?" Sengoku muttered in annoyance.
Little by little, numerous huge ships made of metal began to emerge from the fog, approaching towards Marineford.
All of Marineford fell into a tense silence as they watched the huge fleet appear.
Suddenly, a whirlpool formed in Marineford Bay as if something was about to emerge from under the water.
"Impossible!" Sengoku said as he noticed the whirlpool.
From the whirlpool emerged a large ship covered by a huge bubble, that ship was none other than the Whitebeard Pirates' main ship, the Moby Dick.
...
An hour before...
At the Gates of Justice, the sun shines on the calm sea while seagulls circle. The marines were relaxed, some of them were waiting to watch the broadcast of Ace's execution. But without them realizing it, several invisible figures infiltrated the command center.
'Naomi, are you ready to deploy our skills and surprise these marines?' Goro communicated telepathically with Naomi, with a playful spark in his eyes.
'Of course! Who knew our skills would be so useful in this world?' Naomi responded when she saw that no one could detect them.
The squad led by Naomi and Goro, who were wearing chakra armors, gathered around them. Naomi concentrated, using her abilities to detect the position of all the marines.
Then Goro and Naomi telepathically sent the information to the entire squad. After they established the blocking bar, and when everyone was in their positions Naomi channeled chakra into her throat to scream. "Begin!"
Naomi, using the Sharingan along with her special abilities immediately invaded the minds of all the marines, leaving them stunned for a moment.
Goro laughed loudly as he used his telekinesis to disarm the marines, making their weapons float in the air before launching them at them.
Naomi, along with the rest of the squad, showed off their camouflage skills, appearing and disappearing before the amazed eyes of the marines as they attacked them.
Between laughter and a series of abilities incomprehensible to people in the world of One Piece, Goro and Naomi took control of the Gates of Justice.
In the control room while Naomi activated the mechanism to open the doors of justice, she took out a communication device and called Raion, who was leading the fleet along with the rest of her siblings. "Big brother, we have succeeded in our mission. You can proceed according to the plan."
"We'll catch up with them at Marineford!" Goro exclaimed excitedly.
Naomi also smiled excitedly since this was the first time they participated in such a large scale war.
…
...
After being revived, Senju Tobirama never thought that he would one day participate in such large-scale battles and even more so that these battles would involve the fate of an entire universe. He was currently supervising the flagship of the Shinobi World's fleet.
The fleet has just crossed the gates of justice and was preparing to get involved in one of the most important Wars in this World.
What he disliked the most was that he had to take care of the brats of the Uchiha clan, he didn't understand why those evil Uchiha could be so powerful at only 10 or 11 years old. And now he had to stop them from doing something crazy and rushing to the front lines.
The worst of all is that Natsuo said that he had to go deal with the people in Mary Geoise, so Tobirama became responsible for this operation.
Tobirama sat in the captain's chair. "Have you notified everyone to be ready for battle?" Tobirama asked Raion who had just entered the command bridge.
"Yes, but Sasuke was delayed because of the stowaways he brought to the ship." Raion responded seriously.
Sometimes Tobirama didn't understand how a child like Raion could be part of the evil Uchiha clan. Just as Tobirama was about to get angry at Sasuke for his actions, he entered the command bridge.
"Evil Uchiha, how dare you bring those kinds of women onto the ship when we are carrying out such an important task!" Tobirama knew Sasuke's character well since he became Jiraiya's disciple.
"They are not that type of women, they are the daughters of the King of Porsain."
Porsain is the kingdom where the Cosmic Gate opened and was controlled by the Shinobi World. Tobirama remembers seeing the appointed King and his family see off the ships from the port, including his daughters. He tried to think of how they could have gotten to the ship.
"You don't need to think about it, I brought them using the Flying Thunder God." Sasuke told him indifferently.
Tobirama was furious when he heard that, his precious technique was used for this kind of thing. Just as he was about to scold Sasuke, Raion interrupted him. "Tobirama-sama, we are about to arrive at Marineford."
When he heard that, Tobirama turned to look from the bridge at the imposing fortress of Marineford, and moments later he saw the scene in which the Moby Dick appeared in Marineford Bay.
He immediately ignored Sasuke and went to the deck preparing for battle.
When he reached the deck he saw Ryoji, one of Natsuo's sons, holding a huge saber. He was surrounded by the members of the Funato clan as they chanted his name and rang their weapons in anticipation of the slaughter, each of them eager to rush to kill the enemies.
Tobirama immediately approached Ryoji and led him away from the crowd. "Evil Uchiha brat, didn't your father warn you not to go to the front of the battle. You could be killed by an Admiral if you're not careful!"
At that moment a loud voice was heard. "Gurararara! I'll save you Ace!"
Immediately afterwards the sea water at Marineford rose and became a tsunami.
"Ice Age!"
A moment later the entire enormous Tsunami froze.
"Come on Madara, let's join in the fun!" Hashirama was very excited to see such a demonstration of power.
"It seems there are some guys who are strong enough to catch my interest." Madara commented.
Immediately afterward, Hashirama and Madara launched themselves forward, and began running over the sea.
Tobirama could only watch helplessly as his brother and Madara left, without taking into account all the plans that had been made in advance. "How are we supposed to save the target people and eliminate the people who might become obstacles in the future..."
"To hell with it, this is evil Uchiha Natsuo's fault for leaving early!" Then he also launched himself to join the battlefield.
...
Note: I want to thank everyone for reading this story. I have decided to end the novel at this point because I consider that the plot from this point on begins to become somewhat confusing. For those who wish to search for the original novel, the name of the story in Chinese (simplified) is: "木叶:复兴宇智波,从纳妾开始"