Ultimately,
Tanjiro, who originally only had enough reward points to buy two Five-Yang Scarlet Pills, which Uncle Nine said could cure demonization, managed to have Uncle Nine help him refine a batch of five pills for the same cost.
The price was that Tanjiro's quest log now had two new quests to collect Yin-attribute materials.
If he couldn't complete them on time, his favorability with Uncle Nine's Righteous Manor and Uncle Nine himself would plummet to rock bottom.
His remaining reward points were not enough to directly exchange for or purchase new skills.
Tanjiro directly upgraded his Water Breathing to Lv.10 and bought a Comprehension Pill to awaken a skill attribute.
[Raging Waves]: When striking continuously, damage increases by 20%.
Currently, Tanjiro's overall strength has surpassed that of ordinary Demon Slayer Corps members.
Hundreds of years ago, during a weaker era for the Demon Slayer Corps, a Lv.10 Breathing Technique was already enough to qualify one as a Pillar-rank swordsman.
A hazy white light flashed, and Tanjiro returned to Mount Sagiri.
He fully explained to his trainer, Sakonji Urokodaki, that he had become a Reincarnation Game player and was undertaking a counter-offensive mission.
"Is that true?"
Sakonji Urokodaki, wearing his red demon mask, showed a look of shock.
Yashiki Kagaya, the head of the Demon Slayer Corps, had instructed that if a Reincarnation Game player appeared, it should be reported immediately.
These were individuals who would be able to bear great responsibilities in the future.
He hadn't expected that Tanjiro, whom he had thought highly of, would actually become a player, as spoken of by the Master.
"Attack me!"
Sakonji Urokodaki threw out a wooden sword and looked at Tanjiro with a serious expression.
According to the Master, there was no way to become a player; it was as if one was chosen by the gods, without any discernible pattern, and one could only pray silently.
If the situation was true, then it was truly a blessing for the Demon Slayer Corps.
"Alright."
Tanjiro didn't refuse; this was the best way to prove he wasn't talking nonsense.
A flowing aura manifested around his body as he swung the wooden sword.
Clang!
The next moment, the two wooden swords collided, and the immense arm strength did not break them; instead, it produced a low metallic clang.
Sakonji Urokodaki's eyes widened slightly, revealing surprise.
The recoil from his wrist was very strong.
A normal swordsman would simply assume Tanjiro's arm strength had suddenly increased, or that he was naturally strong.
But as the former Water Pillar, with extremely skilled and superb swordsmanship, he made a judgment in an instant.
The opponent's physical attributes had not changed at all; they were still the same as before he disappeared.
The sudden increase in the opponent's arm strength he felt was entirely due to his rapidly improving Breathing Technique!
How could that be?
Sakonji Urokodaki's breathing became somewhat ragged due to his shock.
As a trainer, Tanjiro was a provisional swordsman he had personally trained to participate in the Demon Slayer Corps selection.
Although he acknowledged and secretly praised Tanjiro's excellent talent, in less than a year, no matter how talented Tanjiro was, he would only barely reach the level of an ordinary Demon Slayer Corps swordsman.
How could he suddenly unleash such profound swordsmanship?
Water Breathing… Only those with clear minds and calm, steady dispositions could master it. Its characteristics are agility and defense, counter-attacking defensively, entangling and maneuvering like flowing water.
As a Breathing Technique that leans towards defense, it does not provide as drastic an increase in physical capabilities as Stone or Flame Breathing.
Therefore, Tanjiro's sudden significant increase in physical capabilities meant that his Water Breathing had explosively improved within the short two days he was gone…
Directly from an ordinary Demon Slayer Corps swordsman to a level comparable to his own.
He was the former Water Pillar!
"Continue!"
Sakonji Urokodaki steadied his breathing, and faint white mist puffed from beneath his red demon mask.
His aura surged to its peak, and he felt astonished that he was testing a swordsman who had only been training for just over half a year.
He unleashed all ten forms of Water Breathing without hesitation.
The entire training ground seemed to be stirred by continuously surging waves, accompanied by the clear gurgling sound of flowing water.
However, Tanjiro, his opponent, was not overwhelmed by the continuously surging, fluid-like swordsmanship.
Instead, he met it blow for blow, also stirring up waves.
In fact, though it was the same swordsmanship, Tanjiro's sword swings grew stronger the further they went.
It was as if powerful ocean waves, each stronger than the last, were crashing down…
Crack.
Sakonji Urokodaki froze in place, his wooden sword broken.
A crack appeared in the red demon mask on his face, then it completely shattered into two halves, falling to the ground.
If it had been a Nichirin Blade or ordinary iron, he would have been beheaded by Tanjiro, like a demon.
"Are you alright, Master?"
Tanjiro looked at the stunned Sakonji Urokodaki with a worried expression.
He was somewhat annoyed at his own recklessness, unable to stop in time. Being defeated by a novice like himself must make his master feel quite unpleasant…
He could judge that his Lv.10 Water Breathing was roughly similar to Master Sakonji Urokodaki's.
But he had the attribute granted by the Comprehension Pill, [Raging Waves], which continuously enhanced his swordsmanship's power during successive strikes. Since Water Breathing is a continuous swordsmanship, Master Sakonji Urokodaki was not his match.
"That last one… To be able to derive one's own swordsmanship from Water Breathing?"
Sakonji Urokodaki, with his face revealed, was flushed red.
It wasn't from shame at being defeated by a junior, but from excitement, as he exclaimed, "Tanjiro, your strength is now enough to become the Water Pillar!"
Shame?
Having a chosen one like Tanjiro was a blessing for the Demon Slayer Corps and the entire Demon Slayer Continent. His defeat was only natural, so why would he feel ashamed?
Tanjiro felt a bit embarrassed under his gaze, blushing as he said, "That's an attribute…"
"Being chosen by the gods is your talent; there's no need to belittle yourself."
Sakonji Urokodaki suppressed the excitement in his heart and said, "I will explain your situation to the Master…"
"There's one more thing."
Tanjiro almost forgot and quickly pulled out the Five-Yang Scarlet Pills that Uncle Nine had refined for him, saying, "This is a pill I obtained from the Reincarnation Game. It should be able to remove my sister's demonization and eliminate the demon blood that the Demon King left in my sister's body."
The Five-Yang Scarlet Pill, thumb-sized and entirely crimson, was named "Five-Yang" because it required the collection of five Yang-attribute herbs for its refinement.
"A pill that can remove demon blood?"
Sakonji Urokodaki had just taken out paper and pen and almost thought he had misheard.
He had fought demons for countless years and witnessed innumerable families destroyed by Muzan Kibutsuji's blood.
Those who became demons, no matter how strong their will was as humans, could not escape the Demon King's control and eventually degenerated into pure demons that fed on human blood.
For nearly a thousand years, countless people had thought about ways to turn demons back into humans, but various methods had been tried without any success.
It was as if their fate was locked.
Therefore, when he saw Tanjiro carrying Nezuko, who had become a demon, although he didn't say it aloud, Sakonji Urokodaki deep down had no expectation that Nezuko could become human.
Being able to restrain her urge to eat humans was already something Sakonji Urokodaki had never heard of.
Now, Tanjiro was actually saying there was a way to turn demons back into humans?
Unbelievable!
"I want the first pill to be for my sister."
Tanjiro's tone was firm.
Everything he did was driven by his hatred for demons and his grand mission to save humans threatened by demons, but also by his determination to turn his sister back into a human.
"Let's try first…"
Sakonji Urokodaki's voice was a bit hoarse as he spoke.
He watched eagerly as Tanjiro brought out the bamboo basket, carefully coaxing the bewildered Nezuko to eat the pill, as if it were a candy bean.
"Awuu!"
The mini-sized Nezuko puffed out her cheeks, chewed twice, and then swallowed the pill.
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