In fact, by reading Urashiki Otsutsuki's memories, Bai Sui has come to understand why Urashiki is so hostile towards him, and even considers him the greatest enemy of their clan.
This story even begins with Momoshiki Otsutsuki and Kinshiki Otsutsuki. In the timeline before Urashiki Otsutsuki arrived, Momoshiki Otsutsuki used his time-stopping ability at the last moment, intending to eliminate Madara Uchiha and Senju Hashirama before planting his own Karma seal.
However, this was discovered by Bai Sui on Earth. He found that time had stopped in a Urashiki Otsutsuki area, including Earth. So he used some unknown method to destroy Momoshiki Otsutsuki, which directly caused Momoshiki Otsutsuki to be completely annihilated, leaving not even ashes behind.
Without the intervention of Urashiki Otsutsuki, although Bai Sui and his group did not obtain any substantial spoils of war, they also did not leak any information related to Earth. As a result, Urashiki Otsutsuki, who was still carrying out other missions, had no idea what was happening here.
However, when Urashiki Otsutsuki was carrying out another mission, he also encountered enormous obstacles and ultimately failed to complete the mission. By this time, 20 years had passed.
Urashiki Otsutsuki was originally waiting for Momoshiki Otsutsuki to finish his mission so he could come and help him, but there was still no news from Momoshiki Otsutsuki, which made Urashiki Otsutsuki think that his clansman was held up by his mission.
So after escaping his original mission, he hurriedly headed towards Earth. His intention was to first gather the strength of the three of them to solve the mission on Earth, and then have Momoshiki Otsutsuki and Kinshiki Otsutsuki join him to solve his previous mission.
Remember how we mentioned before that Momoshiki Otsutsuki was extremely skilled at refining Chakra Pill? That's why Urashiki Otsutsuki came to him – he had also discovered a life-bearing planet, but it didn't seem suitable for planting the God Tree, and he wanted Urashiki's help to refine it into pills.
When Urashiki Otsutsuki arrived on Earth, he immediately discovered that there was no trace of Momoshiki Otsutsuki or Kinshiki Otsutsuki. Urashiki Otsutsuki knew then that something had changed and something big had definitely happened.
Afterwards, Urashiki Otsutsuki did not make a fuss, but instead quietly landed on Earth and transformed himself into an ordinary person.
Urashiki Otsutsuki lay low on Earth for about six months, trying to gather information about Momoshiki Otsutsuki, until he was identified by the Ninja World's regular census.
During his six months on Earth, Urashiki Otsutsuki learned most about were the various legends related to Bai Sui. Combining his understanding of Bai Sui's own condition with the clan's records about the God of Otsutsuki, Urashiki Otsutsuki suspected that Bai Sui had embarked on the true path to godhood and was about to become an existence like the God of Otsutsuki. This was precisely the reason for his hostility towards Bai Sui, because the true god could only be one from their Ōtsutsuki Clan.
As for why Urashiki Otsutsuki believed that Bai Sui had already embarked on the path to godhood, he even said it all started twenty years ago.
After killing Momoshiki Otsutsuki, no other Otsutsuki clan members attacked, and Bai Sui really didn't know what to do next.
However, since Bai Sui was saving his state in real time within the Inner Landscape, Bai Sui could boldly try things out, but he had to shift all his focus to his Yang Spirit.
At that time, Bai Sui had already abandoned his physical body, or rather, he had completely transformed his physical body into his Yang Spirit, and always walked on Earth in the form of Yang Spirit.
Because a member of their Ōtsutsuki Clan once appeared who was extremely close to the God of Otsutsuki, Shibai Otsutsuki, their clan can be said to have a relatively good understanding of becoming a god.
However, that Shibai Otsutsuki had refined his physical body to the extreme, which can be said to be a different path. But later he discovered the problems with it, so he resolutely abandoned his physical body.
However, in this remote and impoverished place on Earth, Urashiki Otsutsuki discovered that Bai Sui had devoted most of his energy to his spiritual cultivation and was about to succeed. This was simply unbelievable to him, because this was the method for achieving godhood that his Ōtsutsuki Clan had spent hundreds of thousands of years to develop.
Therefore, after being identified as abnormal by the Ninja World, he didn't even intend to meet Kashiwagi. Because his clan had produced an Shibai Otsutsuki, they understood the power of Bai Sui's level. So, he immediately activated the Ōtsutsuki Clan's treasure, the Raku.
Strangely enough, this treasure of the Ōtsutsuki Clan had been lost for ten thousand years, yet he found it on Earth. Although he didn't know why it was lost on Earth, he knew from clan intelligence that it was the result of an experiment. So he didn't think too much about it and simply believed that this was a blessing for the Ōtsutsuki Clan, allowing him to go back in time to call for help and kill Bai Sui before he truly became a god. Thus, he rewound time to a point in time that he knew on Earth.
Urashiki Otsutsuki's timing was correct; he successfully prevented Momoshiki Otsutsuki's time stop and took him with him, thus avoiding his death.
The reason for rescuing Momoshiki Otsutsuki was that Urashiki Otsutsuki's use of that treasure had consumed a large amount of his chakra, preventing him from using his teleportation ability to return to the Ōtsutsuki Clan as quickly as possible.
Do you remember why Urashiki Otsutsuki initially sought out Momoshiki Otsutsuki? That's right, he had another mission, although it no longer seems important to him now.
However, the life energy on that planet was exactly what Urashiki Otsutsuki needed. Although information about the sapling of the God Tree had been discovered on that planet, nothing else mattered compared to becoming a god.
Right now, all he wants is for Momoshiki Otsutsuki to refine all the life energy on that planet into Chakra Pill.
According to his calculations, if Momoshiki Otsutsuki, the resulting Chakra Pill would be enough to allow them to teleport directly back to the Ōtsutsuki Clan's territory. This would not only allow them to report on Bai Sui in a timely manner, but they might even have some surplus at the end.
As for what happened afterward, Bai Sui knew everything. After all, both of them had been caught up by Bai Sui and even turned into Bai Sui's supplies.
What intrigued Bai Sui in this memory was the other life-bearing planet discovered by Urashiki Otsutsuki. According to Urashiki Otsutsuki's memories, a member of the Otsutsuki clan had perished on that planet some time ago.
Moreover, that Otsutsuki clansman was carrying an immature sapling of the God Tree. It was precisely because of the search for the lost God Tree that Urashiki Otsutsuki was able to successfully find that planet.
However, what interested Bai Sui was not the Otsutsuki clan, nor even the sapling of the God Tree, but rather Bai Sui fact that everything on this planet seemed increasingly familiar to him.
Especially those people in the final battle against Urashiki Otsutsuki —they looked so familiar to Bai Sui. Why? Because this planet looked like the world of One Piece.
Then Bai Sui thought about it and realized that the lost sapling of the God Tree, which had been missing for an unknown period of time, and the various Devil Fruit in the One Piece world, seemed to be a possibility. Perhaps the life forms on that planet modified the God Tree sapling in their own way after obtaining it.
However, that planet isn't a pressing issue for now. After all, it's there, it's not going to grow legs and run away, and Bai Sui already knows its location. It's even not far from the meteorite where they fought before.
It's true that Bai Sui was too tense during the battle earlier, and his attention was focused on Otsutsuki and Momoshiki Otsutsuki in front of him. Otherwise, if he had looked up at the starry sky, he might have been able to see that blue planet directly.
At the same time, Bai Sui also felt a little regretful, because from the memories of Urashiki Otsutsuki and Momoshiki Otsutsuki, he learned that the reason they valued the Earth so much was not because they valued the life energy on Earth, or rather, life energy was secondary; what was truly important was the God Tree itself.
Even within their Ōtsutsuki Clan, this God Tree was considered a rare treasure.
They couldn't even have one for each person. For example, none of the three Urashiki Otsutsuki, Momoshiki Otsutsuki, and Kinshiki Otsutsuki had the God Tree, not even a sapling.
On Earth back then, besides the God Tree that was already in use, according to the information obtained by Momoshiki Otsutsuki, the now-extinct Ōtsutsuki Isshiki should have possessed another Ten-Tails.
Urashiki Otsutsuki Zhengyi Sect wanted to find on Earth was the God Tree. However, it now seems that the other Ten-Tails on Ōtsutsuki Isshiki's body is likely stored in his private space.
Just like Otsutsuki Kaguya's Amenominaka and Bai Sui's Gen, this private space doesn't necessarily collapse after the death of its owner. However, because the owner is gone, no one can locate that space. In other words, the Ten-Tails should now be lost in the endless spatial turbulence along with Ōtsutsuki Isshiki's private space.
Bai Sui could only feel deep regret at this situation. After all, if he had known beforehand that there was such a Ten-Tails, he would never have destroyed Ōtsutsuki Isshiki so easily. He would have tried every means to open his private space and take out the Ten-Tails for research.
As for the Ten-Tails that was originally part of the God Tree, after talking with Otsutsuki Kaguya and obtaining a lot of information about the Ōtsutsuki Clan, Mai-sui already knew that the Ten-Tails no longer existed, or rather, it had become part of Otsutsuki Kaguya.
After Otsutsuki Kaguya devoured the Chakra Fruit, in order to gain even greater power and greater control over the God Tree, she also swallowed the Ten-Tails into her body, or rather, merged them into one.
The reason Otsutsuki Kaguya did this was simply because she feared the Ōtsutsuki Clan and wanted to preserve her life to the greatest extent possible through this method.
After all, as a guardian, her authority was inherently lower than that of the protected. Although in this Ninja World, because there were no other Ōtsutsuki Clan at the time, no one could compete with her for control of the God Tree.
However, once the Ōtsutsuki Clan arrives in the Ninja World in the future, any of the protected beings will have higher authority than her and could easily seize the God Tree. Once she no longer has the God Tree as a shield, the Ōtsutsuki Clan, without any scruples, will have many ways to deal with her.
After all, Kinshiki Otsutsuki is a good example. Whether he did it willingly or not, the protected one had many ways to turn Otsutsuki Kaguya back into a Chakra Fruit.
Therefore, to ensure that the Ten-Tails would not be taken away, Otsutsuki Kaguya simply merged with the Ten-Tails. From then on, she was the Ten-Tails, and the Ten-Tails was her; there was no longer any difference between the two.
Even if the Ōtsutsuki Clan wanted to deal with her, they wouldn't choose to destroy her because of the preciousness of the God Tree. At worst, she would just be a living God Tree, planted on a planet. Compared to the fear of death, Otsutsuki Kaguya would rather endure this torment.
Bai Sui stretched his body, then arrived on the moon. Seeing that it was midday, he instructed them to notify the higher-ups of the Ninja World to hold a meeting that afternoon, as Bai Sui had some important matters to discuss.
Everyone knows Bai Sui's personality, so naturally they wouldn't be negligent. In the afternoon, almost all the high-ranking members of the Ninja World gathered together. The reason for saying "almost" is that they had previously established relevant rules that no matter how important the event was, they must have a corresponding high-ranking member in charge and could not neglect management. After all, losing two people wouldn't have a big impact, and the information just needed to be conveyed properly.
Bai Sui looked around at everyone present. "Everyone, the reason I've gathered you all here is to announce some important information. Do you all remember the three Momoshiki Otsutsuki who attacked a month ago? This information is related to them."
Upon hearing this, everyone was startled, thinking that Bai Sui had another premonition that a member of the Otsutsuki clan would come, and they became extremely tense.
However, Bai Sui waved his hand, indicating that everyone should not panic, and that he had good news to say, not bad news.