However, Su Chen did not intend to make the Wind Pillar reach his level. He only needed to make the Wind Pillar's killing intent temporarily render the enemy unable to resist.
It's an instinct: when faced with Life and Death threat, and when that Life and Death is significant enough, a person is left with only fear and despair, and even the thought of running away disappears.
After Su Chen explained the three breathing techniques to Wind Pillar immediately began to try them out, but he soon felt uncomfortable and his breathing became extremely difficult.
There's a feeling of congestion inside my body, and when I use Shadow Breathing, it's like my nose is mostly blocked, leaving only a small gap for breathing. It's very uncomfortable, like I'm about to suffocate at any moment.
After only about thirty breaths, Wind Pillar was panting heavily, his face flushed red.
"Thirty breaths, not bad."
"Breathing techniques need to be combined with training to significantly improve your strength, so what you need to do today is very simple: weighted running."
Running with weights?
Wind Pillar raised an eyebrow slightly; this seemed to pose no challenge for him.
Su Chen took out more than ten small iron pieces from inside the house, then tied them to Wind Pillar's limbs, and said calmly, "Your task is simple: run 150 kilometers today."
"I've calculated it. The Demon Slayer Corps' headquarters is about two kilometers in circumference. You just need to run seventy-five laps around it, and... you can't stop during that time."
A rare seriousness appeared on Su Chen's face.
The Wind Pillar changed color slightly. One hundred and fifty kilometers, still carrying a load. Although these iron blocks didn't feel too heavy to him, one hundred and fifty kilometers was still a bit long.
It can't stop yet.
"Oh, right."
Su Chen added again, "You must finish the run today, and you must use Shadow Breathing at least three times during the run."
Wind Pillar took a deep breath and immediately ran to the side.
It was fine at first.
But when he reached the ten-kilometer mark, Wind Pillar felt a bit tired, though not intensely. By the fifty-kilometer mark, he was already sweating profusely.
But there are still no major problems.
After running 100 kilometers, Wind Pillar felt weak all over. Running 100 kilometers continuously without stopping, especially with a heavy load, would have been impossible if he hadn't been physically very strong.
His pace slowed, but his gaze remained unwavering.
They set off in the morning and it wasn't until after Sun and nightfall that Wind Pillar's figure finally appeared, swaying precariously, at the entrance to Su Chen's Courtyard.
This day had almost completely drained him of his energy.
He was able to reach Su Chen's door almost entirely due to his willpower; otherwise, he would not have been able to hold on for so long.
Su Chen glanced at him. "Not bad, come again tomorrow morning."
Wind Pillar gritted his teeth and staggered home. The next morning, he arrived at Su Chen's Courtyard gate early as usual, his whole body wracked with a tearing pain.
Su Chen remained seated cross-legged in the Courtyard: "The same as yesterday's request: be back before tonight."
His Shadow Breathing is different from other breathing techniques. The final state of the breathing techniques in this world is to activate the Demon Slayer Mark, but Su Chen doesn't like that method because the drawbacks are too great.
Shadow Breathing does not have such drawbacks. After training, one can not only reach a level of strength surpassing the activation of the Demon Slayer Mark, but also avoid the worry of dying young.
However, the price paid was also very high.
Just Wind Pillar, he might need to put in an enormous amount of effort to fully master the Shadow Breathing.
These past two days, Su Chen has also been studying the Fifth Form of Shadow Breathing.
The core of Shadow Breathing is related to assassination, so this Fourth Form must also be close to assassination.
Of the four techniques in Shadow Breathing, three are support-type, and only Shadow Strike is offensive, but it is clearly insufficient.
Therefore, Su Chen decided to set the Fifth Form as the offensive type.
There exists a special kind of energy in this world, but the people here only know how to absorb it through breathing techniques. However, in Su Chen's hands, he can freely manipulate this energy.
Just like other breathing techniques that can only enhance one's own attack power, Su Chen can modify them. For example, the Third Form of Shadow Breathing can reduce one's own presence by countless times, so that you can ignore him as he walks past you.
Invisibility isn't true Invisibility; the world can't achieve that level of invisibility yet.
The only way is to reduce one's presence so that others cannot notice it, but even so, it is still quite abnormal. In actual combat, using this move has a very good effect.
Before long, Su Chen had already pinned the information about the Fourth Form to the top of his chat list.
Shadow Breathing is positioned as an assassin, so we should choose a high burst damage, but single-target type.
"Shadow Breathing... Fifth Form, Brutal Strike."
This move can be combined with other skills of Shadow Breathing, and its power exceeds that of Shadow Strike, although it deals damage from the front.
For the next two weeks, Wind Pillar did almost nothing different.
He continued running until evening every day, which caught the attention of the other pillars.
Through continuous running, Wind Pillar's mastery of Shadow Breathing has become increasingly proficient. He used to be able to hold the breath for thirty breaths, but now he can hold it for one or two minutes.
Breathing techniques can transform a person's body and even enhance their resilience.
The upper limit of his breathing technique is almost no less than that of the Sun Breathing; it's just that Su Chen hasn't fully developed it yet. During this time, he hasn't been idle; instead, he has been constantly updating the Sixth Form and the Seventh Form.
The Sixth Form is called Shadow Clone; it creates Clones that inflicts the same damage as the original, but only in one hit.
The Seventh Form is called the Shadowless Sword, which can deal damage from multiple directions simultaneously, catching enemies off guard.
Currently, the Wind Pillar has only mastered the first two forms and is not yet fully proficient, but even so, he can clearly feel his physical body growing and breaking through.
Its strength had increased by at least 20% compared to before, which made Wind Pillar even more excited.
In the following period, Su Chen increased the Wind Pillar by twenty kilometers every two days.