Emiya saw something very interesting in these medical books.

For example, more than 400 years ago, when the wall of Jiguo Yuan was not yet born, the ghost killing team at that time did not know how to breathe, and their battle with ghosts occupied an overwhelming disadvantage.

In those days, just an ordinary ghost could kill several swordsmen of the ghost killing team.

At that time, the swordsmen of the ghost killing team killed ghosts completely by relying on the number of people to fill in with their lives.

Basically, after encountering a ghost, there will be several swordsmen, or even a dozen swordsmen from the ghost killing team, to encircle and suppress them. Every time you kill a ghost, you lose a few of your companions.

At that time, there was no doubt about the power of ghosts.

However, the wisdom of the members of the Demon Slayer Team is not bad, and after realizing the power of the ghost, they began to study the ghost, and many people even came up with a crazy idea.

Fight ghosts with ghosts.

To put it bluntly, it is to take the initiative to accept the blood of ghosts, and to demonize oneself in exchange for powerful power, so as to deal with ghosts.

Therefore, the ghost killing team at that time dispatched a lot of people, caught a few ghosts, used the medical skills of the time to study ghosts, and even transformed their own people to adapt to the blood of ghosts and the abilities of ghosts.

But the result was simple, it failed.

The blood of ghosts is strongly corrosive, and after receiving the blood of ghosts, humans quickly degenerate and eventually become new ghosts.

Of course, there are also some people who are born with a certain resistance to the blood of ghosts, and after receiving the blood of ghosts, they can maintain themselves for a period of time and increase their strength greatly.

This is somewhat similar to the younger brother of the current Wind Pillar Immortal Minoru Chuan...... Immortal Kawa Genya.

Immortal Kawa Genya is such a person, with excellent bite power and digestive organs, and has a special constitution that can eat ghosts, so that short-term ghosts can be turned into ghosts, and the stronger the ghosts eaten, the more the regenerative ability and strength of the ghosts will be improved.

But now it seems that the immortal Chuan Genya can also be said to be very good among those people at the beginning.

It was a very difficult time anyway.

In order to fight the ghosts, the members of the ghost killing team took the initiative to accept the blood of the ghosts, and repeatedly jumped back and forth on the edge of depravity and madness, and at that time, the ghost killing team also developed a lot of drugs that could suppress the blood of the ghosts.

If this path can continue, with the development of medical skills, maybe the ghost killing team can really use drugs to complete the ghosting, and finally maintain their sanity and enhance their strength.

However, it was at this time that the wall of this world was born.

Succession to the country.

Born with the ability to breathe and penetrate the world, the guy who can make mortals desperate with a little effort, when others can't live to be twenty-five years old with markings, the other person can live to be more than ten years old.

His appearance was like a ray of light, illuminating the entire Demon Slayer Team.

So the members of the ghost killing team abandoned the path of suppressing the ghost blood with drugs, learned the breathing method, and with their excellent swordsmanship, they had an absolute upper hand in the battle with the ghosts.

Even the guy Onimai Tsuji was almost killed at the hands of Ji Guoyuan, not to mention other ghosts.

After all, at that time, the Onimai Tsuji Muru had not yet formed the Twelve Ghost Moons.

Ghost Dance Tsuji no Miserable was pressed to the ground by Ji Kuni, and after escaping by luck, he shrank up, and the other demons lost his leader, and were broken by the members of the Oni Slayer team.

The ghosts at that time were once silenced and extinguished.

But it's a pity that Jiguo Yuan finally let Ghost Dance Tsuji run away miserably.

This guy waited until after Ji Guoyuan died of old age, and then ran out to stir up the wind and rain, set up the Twelve Ghost Moons, and hunted and killed a large number of swordsmen of the Ghost Killing Team, resulting in the loss of the method of opening the markings.

And that continues to this day.

Wei Gong flipped through the previous medical skills, as well as all kinds of records, and couldn't help but shake his head, using drugs to suppress ghost blood, the road to having the ability of ghosts, although it was full of blood and tears, but the effect was really there.

It's a pity that this road went halfway, and it was not even half when the country was born and cut off this road.

This makes it a pity for the guard.

If Jiguoyuan hadn't appeared, maybe the current ghost killing team would have been another scene.

These studies may seem amazing, but after all, it is a path that has not been followed, and it is of no use to Emiya.

Wei Gong didn't study it carefully, so he just watched it lively.

However, it was the breathing method and swordsmanship that made Wei Gong refresh his ears and felt a little rewarding.

Four hundred years ago, Ji Guoyuan founded the breath of the sun, but unfortunately, no one has learned this breathing method except for the ancestor of Tanjiro Kamado.

Later Demon Slayer swordsmen derived five basic breathing methods based on the breath of the sun...... Fire, water, wind, rock, thunder.

But these breathing techniques are not for everyone.

According to their own breathing habits, many people have created their own breathing methods again with these five basic breathing methods.

For example, the insect breath of Butterfly Shinobi, and the flower breath of her dead sister Butterfly Chanae. The breath of the sound of the sound pillar Yu Ji Tianyuan, the breath of love of the love pillar, the breath of the xia of the Xia pillar, the snake breath of the snake pillar and so on.

After these people have created their own breathing method, they will stay in the maternity house, fearing that if they die, this breathing method will be lost.

In the four hundred years before them, there were also many pillars who created their own breathing methods, some of which were lost with the death of the pillars, but some of which were copied and left in the Sanyashiki clan.

And these were given to Emiya by Yaoya Shiki.

Therefore, Wei Gong obtained nearly a hundred completely different breathing techniques this time, as well as supporting swordsmanship.

Of course, there are also some swordsmanship before the breathing method was born.

At first, Emiya didn't fancy these breathing methods, and there was only one breathing method he valued, and that was the breath of the sun, that is, Kagura, the god of fire mastered by Tanjiro Kamado.

However, when Wei Gong came into contact with these messy breathing methods, he was surprised to find that there was indeed something extraordinary about these breathing methods.

It's not as useless as I thought.

Although all of these breathing methods are derived from the breath of the sun, after years of development, except for the five basic breathing methods and some characteristics of the breath of the sun, the other breathing methods are only the shadow of the breath of the sun.

In other words, these breathing methods, the breath of the snake, the breath of the sun, and the breath of the flower, basically have little to do with the breath of the sun, but they have their own merits.

As for why Emiya understood so well, of course, it was because he had learned the breath of the sun.

In fact, as early as the end of the Fuji Raid Mountain selection, when Emiya returned to Mt. Sashimo with Tanjiro Kamado to find his master, Kamado Tanjiro performed the breath of the sun, that is, Kagura, the god of fire, in front of Emiya.

Emiya had memorized this breathing technique at that time.

If it had been before, Emiya might not have been able to do this.

But since he learned to read, his physical fitness has improved rapidly, and his brain and mental power have skyrocketed, and the speed at which Wei Gong learns things has become faster and faster.

Set of breathing method, Emiya learned it almost after reading it all.

A piece of cake.

In Wei Gong's opinion, the most amazing point of Sun Breath is not its attack power, in fact, other breathing methods, including Sun Breath, although they can improve the strength of ordinary people.

But this kind of promotion is nothing at all in the eyes of the Emiya.

What really surprised Emiya was that the breath of the sun had some quite powerful effects on the recovery of physical strength.

For example, Tanjiro's father once told him that if Kagura, the god of fire, breathes correctly, he can dance straight.

And when Tanjuro Kamado dances the Kagura Dance, he doesn't feel so tired even if he dances continuously in the heavy snow.

This is enough to prove the power of Kagura, the god of fire, that is, the breath of the sun.

As long as you breathe correctly, your physical strength can be quickly restored, and even a weak person can jump into the night.

Although the breathing methods of other schools also have the characteristics of prolonging physical strength and recovering physical strength quickly, compared to the breathing of the sun, it is even a small thing.

But it is undeniable that other schools of breathing also have their own characteristics.

For example, the breath of Iwa is characterized by its great strength.

As long as you learn this breathing technique, you can fight with heavy weapons, and each blow is extremely heavy enough to easily destroy the ground.

And the Thunder Breath is the fastest and most explosive of all the breathing speeds, and it has extremely high requirements for the user's physical fitness, so it is also extremely difficult to cultivate.

The speed of the move is very fast, and the ultra-high-speed assault will even produce a roaring thunder around it.

When Emiya saw so many breathing methods, a thought suddenly appeared in his mind.

If we take the breath of the sun as the starting point and combine the characteristics of so many breathing methods into one, can we create a breathing method that surpasses the breath of the sun?

It can even be combined with Nian to improve combat effectiveness.

This is not a whimsical of the Emiya.

The main reason is that Wei Gong knows that the upper limit of the breathing method is not low, for example, Wei Gong knows that the door can be called a pervert, and it can even be said that it is a breathing method with extraordinary power.

That's JOJO's Bizarre Adventure Story...... Ripple breathing!

Or it is called ripple qigong.

Ripple breathing not only has a sun-like effect, but also allows the ordinary human body to generate great power in an instant, and can also achieve a variety of different effects through subtle control.

Moreover, the body of a cultivator can be strengthened, and it can resist aging in different ways.

Even such things as healing the human body and springing with dead wood can be done.

Since the Ripple Breath can do this, then there is no reason why the Breath Method of the Demon Slayer Blade World can't do this.

The reason why it can't be done is probably because it hasn't been created yet.

If someone is willing to work on this, maybe they can really create a breath that transcends the sun, and is not inferior to the breath of ripples.