"It's just still quite unskilled."
The Stone Pillar sighed lightly.
"I can only open it for a few breaths, then it quickly closes again."
"Just take it slow."
Tanjuro smiled warmly: "At the very beginning, I could also only open it for a few breaths."
"Slowly it became an hour, then a night."
"How impressive, Mr. Tanjuro."
The Stone Pillar clasped his hands together, tears falling.
What even was this—a gathering of talent hounds?
Lin Chen complained inwardly from the side. Consider the feelings of those around you!
The people around were like Lin Chen—facing the Transparent World that Tanjuro described, they felt no spark of inspiration whatsoever.
This couldn't be helped.
They were all too young. Aside from the Stone Pillar, the Sound Pillar's talent was average.
The Water Pillar, Wind Pillar, and Flower Pillar were too young—only seventeen years old, the same age as Lin Chen.
Their talent and accumulation were far inferior to the Stone Pillar.
However, as long as Tanjuro was teaching them, they might truly be able to unlock the Transparent World in the future.
After all, this generation of Pillars' talent was top-tier even looking across Demon Slayer history.
This exchange was quite friendly.
His Transparent World, and the Sun Breathing he had mastered—without doubt, both could bring enormous improvements to the Demon Slayer Corps.
Very quickly, the most battle-hungry Wind Pillar had already started pulling Tanjuro, wanting to spar.
Tanjuro had a gentle personality, didn't like combat, but also wasn't good at refusing people.
In the end, he was still pulled by the Wind Pillar to fight in the courtyard.
The final result was quite shocking—with just one strike, Tanjuro directly instant-killed the Wind Pillar.
The moment they crossed hands, Tanjuro's wooden blade had already landed before the Wind Pillar's throat.
Tanjuro's body was just a slightly robust adult male's body.
But he couldn't withstand how strong the Transparent World was.
The Transparent World closing off unimportant senses already enhanced his physique.
The breathing technique's amplification, the Transparent World's amplification—these made Tanjuro's speed slightly faster than the Wind Pillar.
Add to that the Transparent World directly seeing through all the opponent's movements—in a spar, it was a one-hit instant kill.
This scene shocked even the composed Ubuyashiki Kagaya, then brought him joy.
He already had some understanding of Tanjuro's situation.
Previously, he had been someone who chopped firewood, made charcoal, and sold it—he hadn't undergone systematic physical training or swordsmanship cultivation.
Even so, he already possessed Pillar-level strength.
If he underwent more rigorous training, he might possess Stone Pillar-level strength.
The Demon Slayer Corps' power would advance even further.
However, being a natural-born leader, Ubuyashiki Kagaya quickly regained his composure.
He withdrew his gaze from Tanjuro, looking toward Lin Chen with a warm smile.
"Could you accompany me for a walk to the back mountain? Lin Chen-san."
"Finally here."
Lin Chen thought inwardly, his expression calm as he nodded to Ubuyashiki Kagaya.
Ubuyashiki Kagaya's body could still barely manage now. Though his constitution was weak, he could still move freely.
Four years later, his condition would worsen, he would go blind, and basically could only be supported by others.
The estate's back mountain held the tombstones of Demon Slayer Corps members.
This place was quite secluded and clean.
Only Ubuyashiki Kagaya and Lin Chen were here—even the Pillars hadn't followed.
"In Mr. Sakonji's letter, I saw that you seemed to know more secrets about Sun Breathing than even Mr. Tanjuro."
Ubuyashiki Kagaya walked side by side with Lin Chen, his voice gentle.
"Can you tell me why? Lin Chen-san, clearly you're someone from another world."
"Why do you know ancient secrets about Sun Breathing that even I need to consult records to learn about?"
"The same precognitive ability as you." Lin Chen spoke calmly.
Ubuyashiki Kagaya paused, then shook his head with a light laugh: "Seems you truly know quite a lot."
"But your ability is far stronger than mine. I can't predict in such detail, much less know the past."
Ubuyashiki Kagaya could tell Lin Chen was lying.
However, he didn't press further.
"Are there any other similar useful pieces of information?"
Ubuyashiki Kagaya asked with some anticipation.
He had a premonition that from Lin Chen, he might obtain more useful information.
"Of course there are."
Lin Chen spoke. His earlier demonstration before Urokodaki Sakonji was precisely for this chance to communicate with Ubuyashiki Kagaya.
"Nichirin blades under high temperature will become Red Blades."
"Red Blades can completely suppress demon regeneration. Against Muzan, the effect is limited, but even against Upper Rank One, they're extremely useful."
Lin Chen opened with a bombshell.
"There are four methods to activate Red Blades. One is full-force collision of Nichirin blades."
"The second is gripping the blade hilt with full force, using powerful grip strength to activate the Red Blade."
"The third is Sun Breathing activating the Red Blade, and finally, flame high-temperature activating the Red Blade."
Ubuyashiki Kagaya was stunned dizzy, unable to maintain the composure that had been on his face all along.
He grabbed Lin Chen's shoulder in one motion, simply unable to believe his ears.
Red Blades that were quite useful even against Upper Rank One?
Completely suppressing demon regeneration.
The activation conditions weren't even difficult.
This was simply more exciting to Ubuyashiki than Tanjuro bringing Sun Breathing.
After all, in the records he had consulted, people who could learn Sun Breathing were extremely few.
But activating Red Blades with Nichirin blades—everyone could do it.
This could rapidly enhance the Demon Slayer Corps' combat power.
"I've lost my composure."
Ubuyashiki Kagaya released Lin Chen's shoulder.
This wasn't a lie. Moreover, something like Red Blades could be verified with one test.
"This is truly the best information I've heard in all these years."
Ubuyashiki Kagaya's face flushed red with excitement. He coughed violently several times, even speaking formally to Lin Chen.
"Mr. Lin Chen, you will be the Demon Slayer Corps' friend forever."
"With this information from you, the casualty rate of members fighting desperately on the front lines will decrease significantly."
"On behalf of all Demon Slayer Corps members, I thank you."
Ubuyashiki Kagaya knelt to the ground, performing a dogeza bow to Lin Chen.
This was the greatest respect he could express to Lin Chen.
Lin Chen was rather surprised. As a great noble, for Ubuyashiki Kagaya to perform such a grand gesture to him was truly rare.
No wonder he could make so many Demon Slayer Corps members believe in him.
"You don't need to do this, Mr. Ubuyashiki. Actually, I also have selfish motives."
Lin Chen spoke, helping Ubuyashiki up.
Good thing the Pillars hadn't followed. Otherwise, seeing this scene, they'd probably want to tear him apart.
"No need to talk about selfish motives. You've given us such tremendous help—whatever requirements you have, just state them."
Ubuyashiki spoke quite sincerely.
The Ubuyashiki clan only lived to kill Muzan.
Aside from that, everything else could be discarded.
Even if Lin Chen made extravagant demands, he would accept them. After all, just Sun Breathing, Transparent World, and Red Blades alone were already quite significant favors.
"The first requirement is: don't reveal my special nature to anyone, especially people coming from my world."
Lin Chen spoke.
"That's natural."
Ubuyashiki Kagaya nodded. With Lin Chen bringing such tremendous help, he couldn't possibly betray Lin Chen.
"As for the second requirement."
"I want to kill demons."