Crackle! A blinding flash of lightning suddenly lit up the night. On the island under the dark sky, Seimei was completely enveloped in lightning. The electric arcs coiled around him like writhing snakes—slithering over his body, burrowing in, then darting out—causing his muscles to spasm and his face to contort into grimaces. This intense state continued for several minutes before gradually subsiding.
At that moment, Seimei opened his mouth and exhaled a wisp of pale black smoke, accompanied by a faint, charred odor.
"Cough… cough… cough…"
He drew his body back, clutched his chest, and coughed repeatedly. At first, his expression showed pain, but it soon faded. After a short while, he exhaled deeply in relief.
By now, every wound—both inside and out—caused by his practice of the "Lightning Release Chakra Mode" had healed completely. After a brief rest, he once again tuned into his inner self. Almost immediately, that familiar sensation returned: the cells that had just been restored by his rapid healing now pulsed with a subtle increase in life energy. Although the gains from these two sessions weren't huge on their own, their cumulative effect was far from negligible.
This was precisely why Seimei had deliberately pushed his body to the brink, overloading his "Lightning Release Chakra Mode" even at the risk of injury. Under normal practice, this technique wouldn't cause harm. However, one time he had gotten overly impatient and misjudged the intensity—an excess of lightning chakra had injured him. Yet after his body healed, he discovered that the training effects were even better than usual. Banking on his formidable recovery ability, he intentionally broke through his limits to enhance the body-refining effect of his technique. And it paid off—under identical conditions, this method improved his performance by roughly 10 to 20 percent.
It might seem like a modest boost, but over time the saved training time adds up significantly. Moreover, after an entire afternoon of testing, he was confident that this approach wouldn't inflict any lasting damage—meaning it wouldn't sap his very life. As long as he kept his breakthroughs within a safe threshold, the only downside was spending a little extra chakra, a price he was more than willing to pay. Besides, training "Lightning Release Chakra Mode" this way also sped up the accumulation of proficiency, allowing him to perfect it faster and maximize its strengthening effect.
With that resolved, Seimei wasted no time. He gathered his internal chakra once more and activated the "Lightning Release Chakra Mode." In an instant, dazzling lightning flared up again. A torrent of electricity, coiling like serpents, re-wrapped around his body—diving in and out across his skin—simultaneously fortifying his body and accruing proficiency. And so, minute by minute, time slipped by.
After roughly another hour, Seimei finally ended his training session. Taking a brief pause, he noted that the scorch marks left by the lightning had vanished. Standing atop a massive boulder, he surveyed the island and the shadow clones training in the distance on the sea. With a thought, he deactivated the "Multiple Shadow Clone Technique." In an instant, the clones disappeared—as if vanishing into the hours that had just passed. At the same time, a flood of training experience and memories surged into his mind. Seimei quickly sat cross-legged, closed his eyes, and methodically sorted through these experiences, converting them into skill proficiency.
About half an hour later, he opened his eyes again. A trace of fatigue now marred his brow. Although his mental reserves hadn't yet been exhausted, he could roughly estimate his limits. According to his calculations, with the recent boosts in his "Spirit" and "Constitution" attributes, his body could now process up to three million points of chakra per day—roughly double what it used to handle. In other words, even if he allocated all the extra 1,436,000 points of chakra, his body could cope.
However, Seimei wasn't planning to push it that far. For one, that would be an extreme risk. Not long ago, he had just antagonized Uchiha Obito—and who knew if Obito might come looking for him? Overexerting himself day after day could provide his enemy the perfect opportunity to strike. So a more measured approach was wise.
Secondly, he didn't need to train every skill simultaneously. Pouring all his chakra into every technique would force him to increase the number of shadow clones working on a single skill at once—drastically ramping up chakra consumption. Instead, he preferred to conserve some chakra and allocate it to his Byakugan to stimulate its evolution.
And third, after an afternoon and an additional half evening of practice, his "Nirvana Essence Technique" had finally accumulated the last thousand-plus proficiency points it needed. It upgraded to level 9 (0/0) of perfection, thereby freeing up an extra 390,000 points of usable chakra.
With that extra reserve, he realized there was no need to invest all his chakra solely in training these few techniques. With a clear plan in mind, Seimei officially began distributing his chakra.
First, he looked at "Izanagi" and "Izanami." Their daily proficiency cap was 500 points—no matter how much chakra he poured into them, they couldn't exceed that limit. So he decided to set them aside.
Next was the "Flying Thunder God Technique." Currently, its proficiency was just a bit over halfway through level 9. At the current rate, it would need roughly twenty more days to fully upgrade to the ultimate S-class level—level 10 (0/0)! Seimei mulled it over and decided to invest an extra 300,000 points of chakra into it. This boost would double its daily proficiency gain to 4,700 points, meaning that in no more than ten days it would successfully upgrade.
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Then came "Magical Mirror World Shift" and "Transcription Seal." Previously, due to limited chakra, he had invested only 120,000 points in the former and 180,000 points in the latter—resulting in somewhat sluggish growth. Now, with no shortage of chakra, he planned to add 180,000 points to "Magical Mirror World Shift" and 120,000 points to "Transcription Seal." This way, each technique would receive a total of 300,000 points. For "Magical Mirror World Shift," the daily proficiency gain would jump from 1,200 to 3,000 points; for "Transcription Seal," it would rise from 1,500 to 2,500 points. Consequently, both should reach level 9 (0/0) of perfection in just over twenty days.
Next was the "Omniversal Seal." As a sealing technique whose potential directly approaches S-rank, its maximum level is 10. At that moment, although it had already completed more than half of level 8, it still required between 120,000 and nearly 130,000 proficiency points to upgrade. Without hesitation, Seimei allocated the entire 390,000 points—saved from perfecting his "Nirvana Essence Technique"—to it, boosting its daily chakra input from 310,000 to 700,000 points. This increased its daily proficiency gain from 3,875 to 8,750 points, meaning it would upgrade to level 9 in roughly four days and then reach level 10 in another eleven days. In all, less than half a month—and Seimei was willing to wait that long.
After that, Seimei turned his attention to the "Chakra Scalpel." For a long time, lacking sufficient chakra, he had abandoned the idea of solely training this technique—using it only occasionally for healing while slowly accumulating proficiency. But now, he boldly allocated 200,000 points of chakra to it. Based on past experience, this investment would net about 2,000 proficiency points per day, so in roughly a month it would reach the A-rank skill cap—level 9 (0/0) of perfection. By then, whether used to heal or to harm, it would be far more effective.
Finally, there was the "Lightning Release Chakra Mode." Based on today's tests, Seimei decided to allocate 100,000 points of chakra to it each day. This would enable it to gain around 1,000 proficiency points daily, so in roughly eighteen days it would reach level 7 (0/0) of perfection—the point of peak efficiency. And why only 100,000 points instead of more? It wasn't that he didn't want to invest extra; it was simply that this technique consumes an enormous amount of time and can only be performed by him personally. Even if he devoted every spare moment (after practicing the "Palm Immortal Technique" and processing the results from his shadow clones) to it, he could only manage that much. So, he was forced to cap it at that level. This method of pushing his limits, while not reducing overall consumption, did speed up his improvement rate.
Shaking his head in silent reflection, Seimei's gaze swept over all his skills as he tallied his additional investments:
– Flying Thunder God Technique: 300,000 points
– Magical Mirror World Shift: 180,000 points
– Transcription Seal: 120,000 points
– Omniversal Seal: 390,000 points (note: this 390,000 comes from the chakra saved after perfecting the "Nirvana Essence Technique" and isn't counted in the main allocation)
– Chakra Scalpel: 200,000 points
– Lightning Release Chakra Mode: 100,000 points
That totals exactly 900,000 points of additional chakra. Adding this to the 1,016,000 points he expended daily from his own reserves and the 600,000 points provided by his Seven-Tails, the complete daily consumption came to 2,516,000 points (900,000 + 1,016,000 + 600,000).
"Excellent—this is still under the three-million-point limit," he murmured to himself, nodding in satisfaction.
Then his eyes fell on the remaining 936,000 points of chakra (calculated as 400,000 + 1,436,000 – 900,000). After some thought, he decided to set aside a small portion—36,000 points—for early-stage improvements to his "Heart Reflection Technique" and for miscellaneous tasks like activating his Byakugan to survey the surroundings, using the "Flying Thunder God Technique" to reposition, or employing "Wind Release: Wind's Wing" to shift his battle stance. With that reserved, the leftover chakra totaled exactly 900,000 points—which Seimei intended to devote entirely to nurturing his Byakugan. This would allow it to gain about 9 evolution points per day. Though that wasn't a huge amount, it was about the limit his Byakugan could handle.
Everything was coming together perfectly. Satisfied, Seimei shut down his display board. But the moment he allowed his mind to relax, a wave of exhaustion washed over him. Reflecting on the grueling ten days of training, he decided he wouldn't linger here any longer. With that thought, he activated the "Flying Thunder God Technique" and returned directly to Konoha.