The pirates sat and forgot, and they really believed the nine truths and one lie.

The first ten students in Rengoku Kyojuro's training class received the teacher's family secrets, which have not been passed on to others for the time being.

Marshal Zhan Guo has issued an order that the breathing method is temporarily only open to senior navy officers. This universal skill cannot be leaked through the hands of the navy.

The ten students have no time to pay attention to the outside world. They must learn the breathing technique as soon as possible before the war. Becoming stronger is the bottom line.

"It's so difficult. Learning breathing techniques still requires talent. I can only maintain the breathing technique state for a few seconds after learning it all night." Tashigi couldn't help but stretch.

None of the ten students left the training grounds, and had no intention of sleeping. They wanted to master the breathing technique overnight and get into the basics of breathing technique.

Rengoku Kyojuro once said that the true standard for mastering breathing techniques is to be able to use them anytime and anywhere, even while sleeping, relying on muscle memory.

Only when one reaches the above state can one be considered to have learned the breathing method. Tashigi can only maintain the breathing method for a few seconds, and cannot even find a natural attribute that matches her own, which means she has not even entered the door.

In the afternoon, Rengoku Kyojuro had already helped the students answer questions. He was supposed to accompany the students to study in the evening, but he was persuaded by everyone to return to the dormitory to rest first.

The students have already overcome some basic skills problems. The next hurdle they have to overcome depends on themselves: how to maintain the breathing state for a long time.

"It just proves that you don't exercise enough and your body functions are not up to standard," Erza pointed out the problem with her deputy.

Breathing techniques strengthen cardiopulmonary function. Ordinary people who do not exercise regularly may not be able to withstand this enhanced burden and may even experience symptoms of internal bleeding.

Students with stronger physical fitness and sufficient talent can already maintain the breathing state for several hours. Levi is the fastest student to get started.

The breathing method opens up the acupoints in the body, trying to receive natural energy through the body and find the natural attributes that match oneself. Rengoku Kyojuro described it as the slowest step, which requires a bit of luck.

If you are unlucky and use something that does not suit your natural attributes, you will need to spend time and effort to replace it later, and all your previous efforts will be wasted. Students must choose carefully.

Erza can maintain the state of breathing techniques for half an hour. She is temporarily stuck at the step of communicating with natural energy. Breathing techniques enhance women's senses, so perhaps she hasn't learned enough.

"Erusa, look at that student. I don't think I'm seeing things. It seems like there's electricity running through his body."

Dashiqi, who originally had a desperate mentality, suddenly felt a little lazy and began to observe the progress of other students. Unexpectedly, she actually discovered some clues.

Following Tashigi's voice, the trainees all looked at the shortest marine in the room, Levi, who was only 1.6 meters tall and instantly became the focus of the training ground.

Levi's breathing gradually changed from rapid to deep, his chest heaving violently, as if he wanted to inhale all the air around him into his lungs.

He closed his eyes, his eyelashes casting a faint shadow under his eyelids, and all the sounds around him gradually faded away.

All that was left was the sound of the evening breeze blowing through the hair, the slight trembling of leaves stretching on the branches, and the sweet and fishy smell of the earth beneath my feet.

When his consciousness was completely immersed in this tranquility and silence, he seemed to touch the energy flowing between heaven and earth.

It was an invisible and intangible yet real and tangible existence, moving among his limbs and bones, and the breathing method helped him open up the most important acupoints in his body.

A faint golden light lit up from the ends of his hair, and then fine golden arcs began to jump around his body, as if they had life, winding along the direction of his meridians.

"I didn't expect that Levi would be the first to succeed. He is really a buried genius," Erza sighed sincerely. With Levi's talent, if he had met a good teacher in his youth, his achievements would not stop there.

Levi is small and his face doesn't look old, but he is actually in his thirties and has officially entered middle age.

More and more electric arcs appeared on the man's body. From the initial few strands, they gradually gathered into a crackling net.

Levi, who had mastered the breathing technique, opened his eyes, raised his arm, and observed the golden arc flowing through his fingertips. Even he himself did not expect it to be so smooth.

Levi is talented and hardworking. Although he looks small, he is actually not someone to be trifled with. When he first joined the navy, he was bullied by tall sailors.

He did not choose to swallow his anger, but fought back directly on the spot, breaking the noses of several tall men, stepping on their faces with the soles of his shoes, and forcing the unreasonable people to apologize to him.

Levi has a very old-fashioned personality. He is usually either cleaning or exercising. Occasionally, when he has free time, he drinks black tea. He is one of the men who is not very sociable in the navy.

"So the attribute you realized is thunder?" Gion observed Levi's body carefully. It would be a lie to say that he was not envious.

Like Gion and Erza, they are both stuck at the critical point of exploring natural energy. Both women don't know which attribute matches them.

Normally when using a sword to attack someone, he would just casually release the sword energy. Gion's sword moves could not generate attribute attacks.

Fortunately, Erza is a devil fruit user and can gain attribute powers by changing her clothes. She learns breathing techniques just to strengthen her body.

"Rengoku Kyojuro's is the Breathing of Fire, so the breathing method I have comprehended should be the Breathing of Thunder. Let me try this power." An arc of electricity flashed in Levi's eyes, and he looked at the group of dummies standing on the training ground. They were consumables for testing the latest results.

Levi's pupils suddenly contracted, and his muscle memory drove his body into an attacking stance. This was a habit of his.

The chest cavity suddenly expanded, and the air in the lungs instantly turned into boiling energy, rushing through the blood vessels to every part of the body.

He gripped the hilt tightly, his knuckles turning white from the force, and the two swords vibrated in his palms, as if eager to drink blood.

"Breath of Thunder"

The next second, golden lightning burst out from his body, his bones crackled, and his muscles bulged.

He transformed into a streak of golden lightning and charged straight into the crowd of fake people, so fast that he left an afterimage. Wherever the blade passed, the air was torn apart, making a sharp and piercing whistling sound.

The dummies were beheaded in the next second. Some were cut in half, some had their heads flying off, and some were directly blown into pieces by the extremely violent force.

Sawdust and cotton wool flew all over the sky, interweaving with the golden lightning, forming a tragic yet gorgeous picture.

Levi moved freely among the fake crowd. Every swing of his knife was precise and ruthless, and every turn was as fast as lightning.

He was like a tireless killing machine, relying on instinct to maximize the power of Thunder Breath.

But in just a few breaths, the originally densely packed dummies were gone, leaving only debris on the ground.

The last slash of the sword emitted a golden light that dissipated. Levi landed on the ground, breathing slightly, with sweat dripping down his chin.

He looked at the scene in front of him, and his eyes regained some clarity, but his hand holding the hilt of the knife still did not relax.

The air was filled with a strong smell of gunpowder, the smell of lightning burning objects. The speed provided by the breath of thunder was far beyond Levi's imagination.

With the bonus of Thunder Breath, Levi is no longer a third-rate swordsman.