Ten minutes later.
Seimei let out a long breath.
He had finally managed to transfer all the chakra stored in the metallic sphere back into the unique space within his forehead.
At this point, nearly an hour had passed since he had finished his previous round of training.
However, he wasn't planning to jump straight into the next one just yet.
Before that, he needed to summarize his progress over the past few days.
First, Chakra Scalpel and Transcription Seal had both successfully advanced to level 8, significantly enhancing their overall abilities.
Next was the newly upgraded All-Encompassing Seal.
Beyond the previously observed changes, the most important factors were the size of the newly established space and the time required to nurture the Byakugan.
For the former…
Seimei closed his eyes, carefully sensing the distribution of over two million chakra points that he had just transferred back into the space.
Eventually, he concluded that his forehead's unique space could now store around twenty million chakra points.
This was double the capacity from level 8.
Technically speaking, advancing from level 8 to level 9 was a qualitative leap, so the improvement should have been even greater.
And in a way, it was.
However, this time, the upgrade primarily strengthened the seal's stability rather than increasing its storage capacity.
So, doubling the capacity was actually quite reasonable.
Besides, even though it was still just a doubling, the previous upgrade from level 7 to level 8 had only increased storage by five million points. This time, it jumped by ten million instead.
So, all things considered, the improvement was still significant.
At the very least, it would take him quite a while before he could completely fill this space.
After assessing the size of his new storage, Seimei moved on to test its efficiency in nurturing the Byakugan.
With a single thought, he activated All-Encompassing Seal, linking it to his Byakugan.
Then, he began extracting chakra from the space and compressing it further using the seal, increasing its energy density before injecting it into the Byakugan.
Immediately, a familiar tingling sensation spread through him, making him close his eyes in comfort.
Time passed, second by second.
Before he knew it, half an hour had gone by.
"Mmm~"
Letting out a soft hum, Seimei slowly opened his eyes.
His first instinct was to check the remaining chakra in the unique space.
Excluding the chakra he had naturally recovered over the past hour, he calculated that nurturing the Byakugan for half an hour had consumed 150,000 chakra points.
Previously, this process only used up 100,000.
In other words, its efficiency had increased by 50%.
Based on this, even if he were to consume one million chakra points daily for intensive nurturing, it would now only take three hours and twenty minutes, which was a full one hour and forty minutes shorter than before.
For someone as pressed for time as Seimei, this was undoubtedly great news.
"Whew…"
Letting out a long sigh of relief, he muttered, "At least things will be a little easier from now on."
With that, he set aside All-Encompassing Seal and shifted his focus to his physical enhancement progress.
After four days of training—plus the additional half-day spent testing and refining his training plan—he had gathered plenty of useful data.
Using this data, he estimated the time it would take for his body to reach the next transformation threshold.
Thanks to his frequent use of Man's Dominion to guide the process, combined with the synergy between Mystic Palm Jutsu (external healing) and Lightning Chakra Mode (internal enhancement), he predicted that his body would reach the next critical point in about five months.
Yes—even with all these advantages, he still needed a full five months to take the next step.
There was no way around it. The previous two-point increase in his physical constitution had already propelled his body to a whole new level, but at the same time, it had made further progress exponentially more difficult.
That's why it would take at least five months.
And this was only the beginning—as his base attributes continued to improve, the difficulty of advancing would only increase further.
In the future, it wouldn't be surprising if an entire year passed without him being able to gain even a single point in his constitution.
Unless…
He could find a more efficient method of enhancing his body!
Or…
He could further increase his body's potential.
As for finding a more efficient method, he didn't have any concrete ideas yet.
But as for increasing his potential—he was already working on it.
Yes, he was talking about integrating Hashirama's cells.
Currently, he had yet to fully assimilate the Hashirama cells in his body, meaning he hadn't unlocked their full potential.
Once he completely assimilated them, his physical potential would see a massive boost.
At that point, the barriers would be lower, and enhancing his base attributes would naturally become easier.
Speaking of which…
Over the past few days, his frequent use of Man's Dominion to enhance his body had indirectly accelerated the assimilation of Hashirama's cells—even though he had been consciously avoiding guiding that power toward cellular fusion.
After all, Man's Dominion naturally pushed his body toward a more perfect state.
As a result, his Hashirama cell assimilation had still progressed, albeit subtly.
If he were to put a percentage on it, his current assimilation rate was around 52%, an increase of about 2% over the past four days.
At this rate, it seemed like he could fully assimilate Hashirama's cells in just three to four months.
However, that was wishful thinking.
Based on his own observations and tests, assimilating Hashirama's cells followed the same principle as increasing his base attributes—it was easy at first but would get progressively harder.
So, it wouldn't be surprising if he hit a plateau in two or three months.
That said, it didn't mean he was out of options.
Just as he had planned from the beginning, he could gradually use Man's Dominion to improve the assimilation rate over time.
Then, once his body reached the next transformation threshold, he could leverage that moment to make the final leap.
In other words, he still needed five more months before he could fully assimilate Hashirama's cells.
Until then, he couldn't expect to reduce the difficulty of increasing his constitution.
Shaking off these thoughts, Seimei shifted his focus again and opened his status panel, checking the evolution progress of his Byakugan and Sharingan.
Thanks to his frequent use of Man's Dominion, his Byakugan now gained one extra evolution point per day in addition to the standard ten from nurturing.
The same went for his Sharingan—
However, in its case, there was an additional bonus from Hashirama's cells.
As a result, his Sharingan's daily evolution rate was slightly higher, averaging about 1.5 points per day.
These unexpected gains delighted Seimei.
For the Byakugan, it was just a small bonus, since he already had ways to actively enhance it.
But for the Sharingan, it was a game-changer.
So far, he had no direct way to improve its evolution, so even gaining one or two points daily gave him some reassurance.
Even at this rate, though, he estimated it would still take 7,000 days—or 20 years—to evolve into Rinnegan.
But when he thought about Madara Uchiha achieving it only in his old age, he figured…
That wasn't so bad.