Demon Slayer: Strength Gained with Every Swing of the Sword

After Feng Yu completed the trial, Sakonji Urokodaki carefully lifted him into the wooden house and placed him on the bed. He gently tended to Feng Yu's wounds, applying medicinal salves with great attention to detail.

The little white fox, seeing Feng Yu covered in injuries, hopped anxiously around, constantly calling out in distress and occasionally licking Feng Yu's palm.

"Xiao Bai, don't worry. He's just exhausted," Urokodaki said as he gently petted the fox's fur before removing Feng Yu's clothes.

Urokodaki noticed something extraordinary—the wounds on Feng Yu's body were already beginning to scab over.

This made Urokodaki pause and recall what Giyu Tomioka had mentioned about Feng Yu's unusual constitution.

Urokodaki had encountered people with special physiques before, those with what was commonly known as "rare blood."

For demons, rare blood was like a powerful tonic—consuming a person with this blood could be equivalent to feeding on dozens of ordinary humans.

Of course, people with rare blood were also physically stronger and had more vitality. While some of them had accelerated healing abilities, none had a recovery rate as terrifying as Feng Yu's.

"This is a genius... He's managed to grasp Total Concentration Breathing on his own by chance... but it's not perfected yet... Looks like I'll need to adjust his training," Urokodaki thought, deep in contemplation.

After a while, Feng Yu slowly opened his eyes.

The overwhelming fatigue he had felt before had vanished, and instead, he could sense his strength had grown slightly.

"I must have passed the trial..." Feng Yu murmured, slowly sitting up.

Xiao Bai immediately noticed Feng Yu was awake, rushing over to his chest and rolling around with joy.

"You're awake? Come, eat something," Urokodaki called out as he watched Feng Yu struggle to rise, impressed by his recovery. The white mask Urokodaki wore prevented Feng Yu from seeing his face, but the surprise was clear in his voice.

"Urokodaki-sensei!" Feng Yu exclaimed.

"You've passed the trial. It's time for you to start addressing me differently," Urokodaki responded.

"Yes, Urokodaki-sensei!" Feng Yu said, still a bit taken aback.

That day, Sakonji Urokodaki didn't schedule any training for Feng Yu. After all, Feng Yu had just passed the trial, and even with his exceptional healing ability, he needed time to rest and recover.

However, Urokodaki had already devised a new training plan for him.

With nothing to do, Feng Yu began to swing his sword on his own.

Urokodaki observed silently from the side, occasionally offering guidance on Feng Yu's form and stance.

"Your grip is wrong, your elbows are wrong, your stance is off, and your breathing is chaotic. You're just swinging the sword recklessly."

"I... I was just practicing on my own..." Feng Yu admitted, not realizing how many flaws his movements had.

"Kid, watch carefully."

Urokodaki took the sword from Feng Yu's hands. In that instant, Feng Yu could feel a change in Urokodaki's aura. The man's presence became overwhelmingly strong.

"Watch carefully, adjust your breathing so it flows through your entire body, to every cell. This will allow us to push past our limits…" Urokodaki said, his tone commanding.

Feng Yu imagined Urokodaki, his body emanating a stream of white energy. Then, with a single swing of his wooden sword, Urokodaki unleashed a powerful gust of air, striking a large tree. The tree fell with a tremendous crash, as if the force had cleaved through it like a hot knife through butter.

The gust of wind from the fallen tree brushed against Feng Yu's face. His mouth hung open in awe as he struggled to regain his senses.

"Th-this... such... powerful strength..."

Without waiting for Feng Yu to recover, Urokodaki handed him the wooden sword once more and said, "Now, practice as I instructed."

Feng Yu closed his eyes, recalling the exact motion Urokodaki had performed. His body mimicked the movement while adjusting his breathing.

"Hah… hoo~"

As he inhaled, Feng Yu felt the same surge of power he had experienced during the trial.

"Mm? Already in the zone...?" Urokodaki observed, watching closely as Feng Yu's breath filled his body.

"Hah!" Feng Yu shouted, swinging the sword with all his might.

Suddenly, a notification from the system caught Feng Yu off guard.

"Sword Swing Count +10"

Feng Yu blinked in surprise. "What's going on? Did I just gain 10 sword swings... Is that because of the state I was in earlier?"

"No, I need to try again."

He quickly adjusted his breathing, trying to enter the same state again. This time, when he swung the sword, there was no increase in sword swings.

"This isn't right... Something's off. That feeling from before... I need to figure it out and master that state," Feng Yu thought, closing his eyes again.

His mind quieted, shutting out all external distractions. Only the sound of his own breathing and heartbeat filled his consciousness.

Feng Yu could feel the energy inside his body, but it was still scattered and unrefined. He had the ability to control it, but it was still unpolished.

Urokodaki watched with growing astonishment. He hadn't expected Feng Yu to reach this level so quickly.

Feng Yu, now completely focused, stopped swinging the sword. Instead, he focused solely on controlling his breath, directing the energy throughout his body.

As time passed, Feng Yu's breathing became more stable, and his control over the energy improved.

"Hah!" Feng Yu finally swung the sword again.

A visible gust of energy shot out with his movement, cleaving into a nearby tree. A deep gash appeared on the tree's surface.

"I... I did it?" Feng Yu marveled, feeling a mixture of disbelief and pride.

"But the power is still so small... It feels like it's only one percent of what Urokodaki-sensei did... I need more practice. I will become as strong as him. No... I will surpass him."

Looking at the sword mark he had made on the tree, Feng Yu tightened his grip on the wooden sword, determination burning in his chest.

Days Passed

The days went by as Urokodaki began to implement a rigorous training schedule for Feng Yu, similar to the training Tanjiro received in the anime. However, the difficulty was ramped up considerably.

Even though Feng Yu had refined his Total Concentration Breathing, there were several close calls where he almost failed. The training was extremely dangerous, with life-threatening traps hidden everywhere.

Yes, these traps could kill.

There were countless hidden weapons and traps, and Urokodaki seemed to have designed them with Feng Yu's possible evasions in mind. Whenever Feng Yu dodged one, another would be triggered almost immediately.

At the same time, Feng Yu continued to practice his sword swings. Although the frequency of his swings had decreased, his speed and efficiency had increased, and each swing now achieved a count of 10.

Feng Yu's physical strength grew every day. He could feel himself getting stronger with each passing moment.

Finally, a month later, the moment Feng Yu had been waiting for arrived.

The system would soon be activated. 

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