As the cytotoxicity was injected into the body little by little, it reached a delicate balance with the vitality of the First Hokage's cells. The First Hokage's cells finally stopped eroding Chao Yanqian's own cells, and instead fused with Chao Yanqian's body, although not completely suppressed by the cytotoxicity.
This process of fusion was destined to be slow. In the next few years, all the thousands of people who lost their lives needed to inject themselves with cytotoxicity without interruption until the perfect fusion of the First Hokage's cells reached the level of Yamato.
Sitting on a chair to relax his body, an extremely comfortable feeling of warmth continued to spread from the First Hokage's cells, and eventually spread through Chao Yanqian's entire body. The beautiful sensations in the body could not be described in words at all.
It was a kind of tremor that came from the depths of the bone marrow, from the origin of life. Chao Yanqian felt that his entire being had been sublimated in this tremor!
Chao Yanqian could clearly feel that his body was undergoing an unprecedented and wonderful change, the long-awaited change Asuna Tsunina had been hoping for.
By incorporating the First Hokage's cells, Chao Yiqian finally got rid of the shackles of an ordinary body and formally established a connection with the Ōtsutsuki clan.
Ōtsutsuki Kaguya, as the ancestor of chakra, was the first human to possess chakra in the world. An unexplainable mysterious power flows through her blood.
Senju is a descendant of the Ōtsutsuki clan, and the mysterious power of the Ōtsutsuki clan also flows through their blood. This mysterious power is not only strong in combat but is also the key to unlocking the mystery of chakra.
According to Chao Yanqian's analysis, the God Tree is the root of all chakra, and Ōtsutsuki Kaguya, having swallowed the fruit of the God Tree, could integrate with the tree, her bloodline itself possessing the energy compatible with the God Tree.
According to the Nine-Tails during the Fourth Great Ninja War, the chakra of the Ten-Tails is natural energy, that is, Senjutsu chakra.
And the Ten-Tails was formed from the God Tree, and Kaguya swallowed the fruit of the God Tree.
If we proceed according to this logical analysis, the blood of the descendants of the Ōtsutsuki clan has the ability to be compatible with Senjutsu chakra.
Thus, what was previously speculated by Chao Yanqian, that the descendants of the Sage of the Six Paths can perfectly use Sage Mode, is not an unfounded guess, but a fact stemming from the power flowing in their bloodline.
Asura and Indra inherited the physical energy and spiritual energy of the Sage of the Six Paths, respectively. The Senju Clan is the descendant of Asura, and by fusing with the cells of the Asura reincarnate, Hashirama Senju, to a certain extent, Chao Yanqian has established a connection with the God Tree.
In terms of kinship, it is like a relative thousands of miles away.
There are many benefits from the fusion of the First Hokage's cells. The first is that the amount of chakra has slightly increased, and a thing called vitality has also begun to flow in the body of Chao Yanqian.
Although this level of vitality is still far from Hashirama's ability to heal wounds instantly, it does not affect the current joy of Chao Yanqian.
Chao Yanqian could feel that his physical condition was much better than before, and something unclear and inexplicable was now flowing within his body!
The long-held dream had finally come true, and Chao Yanqian urgently needed to adapt to his new power.
Feeling that the First Hokage's cells had stabilized in his body, he cleaned up the messy laboratory at Tsunade's place and then left Konoha Hospital, heading for Konoha's training ground.
Having just integrated the First Hokage's cells into his body, aside from a small increase in chakra, Chao Yanqian's strength had not yet improved significantly.
But Chao Yanqian still practiced at the training ground until evening, not stopping until he was exhausted.
The next period of time was to observe the reaction of the First Hokage's cells in his body. If there were no problems, he could leave Konoha and go to Ryūchi Cave to practice Sage Mode.
Moreover, Chao Yanqian had analyzed the dose and frequency of each injection of cytotoxicity. At the same time, he had to carry cytotoxicity on his body at all times to ensure that the energy of the First Hokage's cells would not spiral out of control at a critical moment.
Three months later.
Chao Yanqian used traveling the ninja world and training as an excuse to apply for a period of leave from the Fourth Hokage and left Konoha alone.
Ninjas are not allowed to leave the village without authorization, but with Chao Yanqian's current status and contributions during the Third Great Ninja War, it was easy to be granted a period of vacation.
In the original work, Jiraiya also stayed in the Land of Rain to train the three future members of Akatsuki for a long time, and it wasn't exactly safe. His status as one of the Sannin, coupled with his war contributions, afforded him many privileges.
Ryūchi Cave is a legendary place for training in Sage Mode, alongside Mount Myōboku and Shikkotsu Forest. It was recorded in the original manga that Orochimaru had once attempted to learn Sage Mode here but was unable to withstand the energy and had to give up.
Later, Kabuto Yakushi also found his way here and, under the guidance of the White Snake Sage, ultimately attained the perfect Snake Sage Mode.
By reversing the perception technique used in summoning jutsu, Chao Yanqian found the approximate location of Ryūchi Cave. On the way there, Chao Yanqian carefully analyzed the risks.
Because Jūgo, who lived near Ryūchi Cave, had absorbed large amounts of natural energy without being able to control it properly, he frequently went berserk.
Therefore, Chao Yanqian reached an uncertain conclusion: the Senjutsu chakra at Ryūchi Cave differs from that of Mount Myōboku. Failing Sage Mode training here results in going berserk rather than petrification.
Based on the appearance of Kabuto Yakushi later, it seemed he merged with the White Snake. During battle, the White Snake absorbed natural energy for him.
However, that kind of transformation was quite grotesque, and Chao Yanqian would rather not practice Sage Mode than end up looking like Kabuto.
Touching the spot on his chest where the First Hokage's cells had fused, Chao Yanqian felt slightly reassured. If his previous speculation was correct, then practicing Sage Mode this time should not be too difficult.
Finding the location of Ryūchi Cave was not hard, but the residence of the White Snake clan was protected by a barrier. Without a summoning contract, ordinary people could not enter.
Ryūchi Cave was vast, feeling spacious enough to accommodate tens of thousands of people.
"Human, the White Snake Sage is already waiting for you!" A white snake hissed to Chao Yanqian just after he entered the barrier.
"It's said that the White Snake Sage can predict the future. It seems that's true." Chao Yanqian smiled and said, "Lead the way!"
After a long walk, Chao Yanqian finally met the legendary White Snake Sage.
On a giant stone throne was a massive coiled python.
This python was pure white, with a gem on its forehead and another on its neck. It had long orange hair tied back and smoked a pipe, resembling a small old woman in appearance.
Chao Yanqian walked forward, bowed slightly, and said, "White Snake Sage! Hello!"
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