After spending a sleepless night, early the next morning, Ye Changsheng bid farewell to Jing Muzi's seniors.

For him, this small mountain village is tantamount to a gentle township, which is beneficial but also depleting.

Jing Muzi's predecessors sent him to protect him, and Changsheng also refused.

A hint of surprise flashed in Jing Muzi's eyes, but he didn't insist: "Young Master Ye, after Qin Feng's trial, I will meet you as soon as possible." ”

Ye Changsheng nodded, after all, Qin Feng was Yi Shuitang's sword, and it was impossible for him to stay by his side all the time, and he had to complete his own trial.

Just as Ye Changsheng has his own way to go, to return to his own world.

Jing Muzi personally sent Ye Changsheng to the small wharf on the bank of the Yishui River, and handed over two ancient books to Ye Changsheng.

"Ye Gongzi, I don't have anything to do with Yishuitang, you can use these two books. ”

"Senior, there will be a period later!" Ye Changsheng bowed and thanked him, and got into the canopy boat.

It wasn't until the boat was far away from the village that Ye Changsheng opened the package and took out two ancient books.

The first book is from Yi Shui Tang, which is somewhat similar to the "Refractive Sword Spectrum", which records a variety of observations and deduction methods related to battles, covering a wide range of topics.

It's just that this book is more detailed, and the traces of Mohist influence are heavier, not only involving the geometric theory of refraction, but also some mechanical formulas and deductions, which integrate the Mohist theory of weapon making and swordsmanship.

This book is just right for Changsheng, and it just makes up for the shortcomings brought by the real martial arts space.

Although the real martial arts space is mysterious, the realism of the battle is very high, but after all, it is a simulated space, and in this soul projection space, many external factors have been fixed and have lost their original authenticity.

In fact, any battle, as long as it takes place in reality, then the external environment will always be different in one way or another, and it cannot be generalized.

A true combat master has long taken into account the factors of the outside world, and then integrated them into his combat realm, and then turned it into an instinct.

These external factors seem to be very fragmented or even minimal, but the battle between two evenly matched masters determines the victory or defeat and even determines life and death, and it is precisely those details that are easy to be overlooked.

Only by taking all these external factors into account can a cultivator's combat realm be raised.

This truth is like an experienced hunter, he does not need to say too much about the big truth, just by instinct, he can find the most appropriate place and lay the most practical trap.

Ye Changsheng's deficiency also lies in this, to make up for this shortcoming, you can only start from the most basic, decompose, step by step.

And to take it step by step, then there must be a systematic method of prediction and deduction, it can be said that the book given to him by Jing Muzi's predecessors is too practical.

The second book is even more useful, and it can even be said to be a big surprise.

This is a notebook, a sword-forging master in ancient times, a notebook used to record his experience on weekdays.

Although three or four thousand years have passed since then, some of the things are still practical and instructive.

You must know that what Ye Changsheng has been studying is originally the ancient method of forging swords, and this notebook is like a heavenly sound floating through time and space to him.

The biggest surprise is that in the notes, the entire process of this sword-forging grandmaster's subduing and controlling the spiritual fire is also recorded, not to mention the detailed content, and there are many personal understandings and opinions of the grandmaster.

The details involved in the notes are even more detailed than the memories passed down by the Infinite Demon Venerable.

In the notes, this sword-forging grandmaster divided the spiritual fire of the Tianxuan Continent into six levels, and the spiritual fire he subdued belonged to the lowest level of sixth-grade spiritual fire.

Sixth-grade spiritual fire, the spiritual fire that exists in the veins on the surface, is like a coal mine close to the surface, because of spontaneous combustion, it can burn under the surface for thousands of years.

The flames raged all year round, forming an absolute fire elemental space underground, and thus giving birth to spiritual fire.

Seeing this, Ye Changsheng couldn't help but feel a move in his heart, because of the two Ye family disciples, when he was collecting information about Tianye Villa, he had paid special attention to the information of Ye Beishan, the owner of Tianye Villa.

The Tianye family is a side branch of the Ye family in Fengcheng, to be precise, it belongs to the Beifeng lineage, and it is said that the spiritual fire that Ye Beishan received is called the Eight Desolation Spiritual Fire, which comes from an underground coal seam that has been burning for 800 years.

In this way, the Eight Desolation Spiritual Fire also belongs to the lowest sixth-rank spiritual fire.

And the spiritual fire that Ye Changsheng subdued belonged to the third-class spiritual fire.

The third-class spiritual fire was born in the veins of the underground of the gods, and they were the veins of the higher elements, most of them were spiritual sparks, burning silently in the inside of the veins, devouring the elemental essence in the veins all the way, and slowly growing up.

This process may last for tens of thousands or even 100,000 years until the elemental essence is condensed to the extreme, thus giving birth to a spiritual fire full of spirituality.

The energy of the third-class spiritual fire is purer, the spirituality is higher, and manpower cannot be surrendered unless it is by chance.

Seeing this, Ye Changsheng couldn't help but secretly rejoice, isn't it, if it weren't for the spiritual fire of the son and mother turning into a rabbit, I am afraid that he will not be able to accept it in his life.

Retracting his thoughts, Ye Changsheng took the notes and continued to read.

The way to control the spiritual fire, the most common method in the Tianxuan Continent is through the handprint.

"Handprints?"

Ye Changsheng's heart moved, and in the memory passed on to him by the Wuji Demon Venerable, a set of peerless learning called "Eight Seals of Spiritual Fire" automatically emerged.

The mudra that controls the spiritual fire and the Buddhist mudra are two different things, the former is a simple technique, and the latter is the power of heaven and earth through the mudra.

For example, in "Eight Seals of Spiritual Fire", the eight handprints correspond to eight concise and clear symbols, which are like the command flags in the army, and a command flag represents an order.

Make a circular handprint, representing the pillar of fire that summons the spiritual fire, and draw two circles in succession, representing the rotating pillar of fire, if you draw a line with your hand, it is to make the summoned spiritual fire become a line of fire.

By freely combining these eight different mudras, you can harness the spiritual fire and take on thousands of different variations.

And these changes are enough to meet all the requirements of the swordsmith when forging the sword.

Of course, these handprints that control the spiritual fire did not come out of thin air, but were finally formed after countless explorations, countless summaries, and countless simplifications by the swordsmiths.

The higher the grade of the spiritual fire, the higher the spirituality, and correspondingly, the easier it is to control the mudra of the spiritual fire.

This truth is like a master teaching an apprentice, a clumsy apprentice may not understand it even if he spits at the stars, but a smart apprentice can point it through with just one sentence.

In the notes, the nine handprints refined by the Sword Casting Grandmaster were a little cumbersome after all, and Changsheng made up his mind to cultivate the Eight Seals of Spiritual Fire created by the Wuji Demon Venerable.

Of course, the premise is that he can control the spiritual fire of the son and mother freely, at least for the time being, Changsheng can't do this.