Demon Slayer: Strength Gained with Every Swing of the Sword

"Ding, congratulations, host, you have received 1,000,000 Sword swings."

"The system is binding, please wait…"

"System binding successful…"

"Ding, you have received the Beginner's Gift Pack*1, please check…"

"The daily check-in function has been activated…"

"The roulette draw has been activated…"

"The character template has been updated, please check…"

"The task function has been activated…"

A series of system notifications echoed in Feng Yu's mind.

He couldn't help but stop mid-swing and check his "Golden Finger."

Character: Feng Yu

Sword Swings: 0

Breathing Technique: None

Martial Skills: Swordsmanship

Quest 1: Join the Demon's Side or the Demon Slayer Corps

Description: Are you confused coming to this world? Will you become a demon or a human?

Quest Rewards: Strengthening Technique, Immortal Physique, 100,000 Sword Swings

Status: Completed

Quest 2: Kill the Demon King Kibutsuji Muzan

Description: Kibutsuji Muzan is the source of all evil in this world. Killing him will end this evil.

Quest Rewards: 10,000,000 Sword Swings, Specified World Cross-over1, Mysterious Big Gift Pack1

Status: Not completed

Chain Quest: Kill the Evil Demons

Description: After sunset, the endless evil demons begin their hunt. You are human. Go and kill all the evil demons.

Rewards: Unknown (Depends on completion percentage, higher completion gives better rewards)

Status: Ongoing

Feng Yu mused, "I didn't expect the system to work like this, just like the character interface in online games from my past life—attributes, quests, check-ins, draws... well, it seems pretty complete. I wonder if more features will unlock later on…"

He then focused on the Specified World Cross-over option. "Does this mean after I kill Kibutsuji Muzan, I can specify which world to cross over to... but what are the conditions for choosing?"

Feng Yu didn't delve deeper into his attributes, so he collected his Beginner's Gift Pack and quest rewards.

"Ding, congratulations, host, you have received the Beginner's Gift Pack*1."

"Ding, congratulations, host, you have received Strengthening Technique, Immortal Physique, and 100,000 Sword Swings."

In an instant, Feng Yu felt his body's cells come alive, filled with even more powerful energy than before.

"I can feel that after reaching a certain age, my body will stop aging…"

He looked at the Strengthening Technique. "Let's see what this does…"

After a while, Feng Yu finally snapped out of his thoughts.

"Impressive! When fully cultivated, this technique can form an invincible membrane on the surface of my body, and my strength can reach the power of nine bulls and two tigers…"

Although Feng Yu didn't know exactly how strong "nine bulls and two tigers" was, it certainly sounded powerful.

After all, anything from the system must be of top quality!

He then opened the remaining rewards.

"Ding, congratulations, host, you have received 10 lottery draws, 50,000 Sword Swings, and a Pet Contract*1."

Pet Contract: Can bind a beast creature to the host through a forced contract, simultaneously improving its intelligence.

"Great! With this, I can make Xiao Bai my pet and make him smarter…" Feng Yu thought, then remembered the check-in and lottery features.

"Ding, you've successfully checked in today, you have received a lighter*1."

"Ding, congratulations, you have received 5 Soul Cleansing Pills, 2 lighters, and 3 colas."

"What the heck! This is so disappointing! Check-in gave me a lighter, and the lottery only gave me lighters and cola…"

"Only the Soul Cleansing Pills are decent…"

Soul Cleansing Pills: Used to cleanse the Soul and reset the body. The more you use, the lower the effect.

"Let me try one…"

After swallowing a Soul Cleansing Pill, Feng Yu felt a hot surge of energy spread through his body, followed by a foul odor.

Looking at himself, he felt as if he had fallen into the mud, covered in an unbearably stinky smell.

"I can't take this… I have to wash off immediately, this is too disgusting."

He hurriedly jumped into the river and scrubbed every inch of his body.

After the wash, Feng Yu felt completely refreshed. His skin, which was a little dark before, had turned fair and smooth, and his strength had more than doubled.

Feng Yu felt that before the system was activated, he couldn't even beat a few people. But now, he was much stronger.

"Should I take another one…" he considered.

"Forget it, Sakonji Urokodaki will probably call me for training soon…"

Sure enough, Sakonji Urokodaki had already arrived at Feng Yu's practice area, waiting for him.

As soon as he saw Feng Yu, Sakonji Urokodaki quickly ran up to him, carefully observing the changes in Feng Yu.

"This is strange… Why have you become so fair? And your flow of energy has become stronger… In just a few hours, how did you do this?"

Seeing the Tengu mask in front of him, Feng Yu could only smile awkwardly. "Sakonji Urokodaki, I'm a genius. Just now, I found a way to better control my breathing, and that's how I got like this…"

Sakonji Urokodaki stared at him for a moment before saying nothing. "Never mind, everyone has their own secrets. Becoming stronger is a good thing for you. I hope you can survive the final trial…"

Feng Yu sensed the unspoken meaning in Sakonji Urokodaki's words—that he hoped Feng Yu wouldn't end up like his previous disciples, never to return…

"Alright, from today onward, the previous training is over. Next, we will focus on a different kind of training: Breathing Techniques!"

Sakonji Urokodaki spoke seriously.

"The Demon Slayer Corps has several hundred members, but it is an unrecognized organization. Yet, since ancient times, it has never ceased to slay demons. However, the leader of the Demon Slayer Corps remains a mystery. Demons feed on humans, kill them, and consume them. The origin of demons is unknown. They have extraordinarily high physical resilience; even severed bones can reattach, and limbs can grow back. Some demons also possess special abilities, like changing their appearance. They only die when exposed to sunlight or when their head is struck off by a special Sword…"

"The Demon Slayer Corps members fight evil demons with their flesh and blood. Since they are human, their wounds heal slowly, and any lost limbs don't grow back. Even so, they continue to battle demons because they are human."

"Fortunately, a great human researcher developed a Breathing Technique that allows humans to possess the same physical resilience as demons. This evolved into the Five Breathing Techniques: Water, Flame, Wind, Thunder, and Rock. I am the teacher of the Water Breathing Technique."

"I've trained many people, but none of them were as talented as you. You've never even practiced Breathing Techniques before, yet you've already mastered Total Concentration Breathing."

"So, I won't teach you Total Concentration Breathing. Instead, I'll teach you the ten forms and techniques of the Water Breathing."

First Form: Water Surface Slash

As Sakonji Urokodaki swung his sword, a half-arc horizontal slash formed.

Second Form: Water Wheel.

Third Form: Flowing Dance.

…

There were a total of ten techniques, each demonstrated in front of Feng Yu, who was also taught how to use them with the breathing techniques.

After Sakonji Urokodaki finished demonstrating all the Water Breathing techniques, Feng Yu looked at his attribute panel, which now showed "Water Breathing: Beginner" along with a "+" sign.

Feng Yu clicked the "+" sign. Instantly, an overwhelming amount of knowledge flooded into his mind, and the Sword swings on his panel dropped to 50,000.

After absorbing the Water Breathing knowledge, Feng Yu felt different when holding his sword.

He was now more fluid, like a stream of water flowing endlessly.

He began to perform all the Water Breathing techniques.

"Incredible… He mastered the entire Water Breathing technique just by watching it once. Truly a genius who mastered Total Concentration Breathing ahead of time. Though he's just a beginner, he's unmatched in history. This kid…"

Sakonji Urokodaki was completely shocked.

"Sakonji Urokodaki, is it me doing this right?" Feng Yu asked, seeing Sakonji Urokodaki standing in silence, thinking he might have done it wrong.

"No, it's perfect. Very good. Keep practicing like this, but you need to imagine yourself as water and merge with it. Follow me," said Sakonji Urokodaki.

He then led Feng Yu to a waterfall.

"Go ahead, practice Water Breathing there, and merge yourself with the water…"

Before Feng Yu could speak, Sakonji Urokodaki kicked him into the waterfall.

"Damn! What the hell…" Feng Yu couldn't react in time and swallowed a few mouthfuls of water.

"This is too brutal…" he thought.

"But training in the waterfall should yield better results. I can't level up right now anyway, so I'll focus on improving my strength first…"

"Strengthening Physique: Beginner → Refined"

"Swordsmanship: Refined → Expert"

Feng Yu's body became even more powerful after processing all the new training, his muscles more defined, and his height grew by 5 cm.

"This strength… I feel like I could arm-wrestle a tiger with one hand…" Feng Yu thought, amazed at the changes.

"Plus, my swordsmanship improvement deepened my understanding of Water Breathing…"

Unfortunately, his Sword swings were now insufficient…

The 10,000 swings for Physique, 20,000 for refining, and 20,000 for Swordsmanship left him with little room to perform sword techniques.

"Let me keep practicing Water Breathing first…"

Feng Yu sat down on a rock beneath the waterfall, allowing the strong water current to wash over him. 

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