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Chu Duan thought of a way, if he succeeded, he could indeed make the sword intent and the mystery reach a turn in a shorter period of time.

The amount of concussive power!

That's right, what Chu Duan thought of was the amount of shock power.

Shaking Mountain Power is a kind of shock force, but this is not the origin of Chu Duan's spiritual light, but the Heavenly Earthquake Rongyuan Sword Casting Dafa.

That's right, the essence of the Heavenly Earthquake Fusion Yuan Sword Casting Dafa lies in the Shock and Fusion.

It's just that because there is only the upper part and only the essence of Zhen, Chu Duan finally perfected the fusion part through personal cultivation and comprehension research, and became a sword-casting method that is different from the orthodox Tianzhen Rongyuan Sword Casting Dafa.

He remembered that when he first received the Heavenly Earthquake Rongyuan Sword Casting Dafa, he realized it, and when he accepted the inheritance, his spiritual thoughts were shocked again and again and became more refined.

In that case, why not use a similar method to shake the prototype of the sword spirit and make the sword intent in it more refined?

However, it is not easy to control one's mental mind to form high-frequency vibrations, and it is also a challenge.

Chu Duan immediately studied it.

After a day passed, Chu Duan found that it was not difficult to make the spiritual mind vibrate, but the frequency of the shock was not enough to form an effective impact on the prototype of the sword spirit, so naturally he could not refine the sword intent.

He continued to think about the research.

"The Nine Turns Heart Seal Recipe is divided into two parts, the mudra and the heart method, with the mudra to pull the heart method, and finally effectively temper the sword intent, since this is the case, why don't I start from these two aspects. Combined with the amount of oscillating force...... "I have a clue." It is better to study and understand.

As everyone knows. Chu Duan was doing something that shocked countless people.

You must know the Dao of the Heavens, the Nine Turns of the Heart Seal, but the ancestors of many swordsmen in the primeval realm. It was created over a long period of time, and then slowly improved over many people's time, until it has become a complete practice today.

Although the Nine Turns Heart Seal in the Tianfeng Sword Palace is only the most widely spread and basic one, it is also the brainchild of countless people. Like some other special exercises for refining the mysteries of sword intent possessed in the Great Potential, they are also evolved from the Nine Turning Heart Seal Technique.

It's just that those special exercises of the Great Potential Force are basically the geniuses of their Potential Force or many people who spend a long time studying and finally improving them.

Chu Duan was doing such a difficult thing now.

Changing the mudra is a very difficult thing to do, and it takes many experiments.

Chu Duan changed the mudra little by little on the basis of the original mudra, and he would carefully experience each handprint, feel the difference, and remember it firmly.

Once again, a powerful soul comes into play.

All day. Chu Duan was improving his handprints, and he remembered them very clearly. There have been 36,000 mudras, each of which looks almost identical, but there are subtle surprises, such as the spacing of the fingers.

Time passed slowly, and Chu Duan was completely immersed in it, and he never got tired of it.

Jiang Chuan Zhilu said that the current Chu Duan must be cultivating with all his strength, improving his strength, and preparing for the challenge of the air battle in the future, so he did not disturb Chu Duan.

In a flash, another two days passed, and during Chu Duan's time, he tried a total of more than 100,000 kinds of mudras, but none of them succeeded.

But Chu Duan didn't feel frustrated, because the failure of these more than 100,000 handprints brought him a lot of realizations, and he had a hunch that soon, he would be able to find the right way to seal and condense the most correct handprints.

For three consecutive days, Chu Duan's spiritual thoughts were almost exhausted, and he hurriedly stopped and ran the Quenching Skill to restore his spiritual thoughts.

When his mental mind returned to its peak, Chu Duan continued to try.

Failure after failure made Chu Duan closer to success.

Condensed the handprint again, the handprint condensed out, and Chu Duan suddenly felt his spiritual thoughts vibrating at a terrifying frequency at high speed.

Chu Duan hurriedly cooperated with the mental method and mobilized his spiritual thoughts.

When the mudra changes, the mind also changes, which is much easier than changing the mudra.

The spiritual mind under the high-speed shock once again surrounded the prototype of the sword spirit, and the shock again and again was like a hammer constantly beating the prototype of the sword spirit, and the regular beating, and the strength of the sword spirit poured into the prototype of the sword spirit with the shock again and again, refining the sword intent.

The efficiency of refining has been more than doubled compared to before.

"It's not enough, it's not perfect enough, if it's good enough, I believe we can improve efficiency again." Chu Duan said secretly, with an excited look on his face, which was a look after overcoming difficulties.

Chu Duan continued to study and perfect it, which may take some time, but Chu Duan firmly believed that sharpening the knife is not a mistake for the woodcutter, and only when the knife is sharpened well, will the chopping wood be handy and more efficient.

It took another day, and Chu Duan finally perfected the first handprint, and the efficiency improved a lot again.

"The current Nine Turns Heart Seal Recipe is different from before, since this is the case, it will be renamed the Nine Turns Heavenly Shock Heart Seal Technique. Chu Duan smiled.

Now that the first mudra has been perfected, it is time to temper it.

Condensing the mudra, the mental method operates, and the spiritual mind surrounds the prototype of the sword spirit, and begins to vibrate at a high frequency, the frequency of the shock is well controlled, if it is too weak, it cannot be tempered, and if it is too strong, it will damage the prototype of the sword spirit.

Under the shock, Chu Duan could feel that the sword intent was becoming more refined.

Soon, two hours passed, and Chu Duan ended this time of cultivation.

"At this rate, it may not take me ten days to refine all the mysteries of the sword intent to a single turn. Chu Duan said secretly.

Now that the sword intent has been refined, after recovering his spiritual intent, Chu Duan began to refine the torn mystery, and the way of refining is the same, using the spiritual intent to surround the torn mystery, and then carry out high-frequency vibrations, as if striking iron.

Perhaps because there are too many mysteries, the relationship between them and the tempering efficiency of tearing apart mysteries is obviously inferior to the sword intent.

Chu Duan didn't have a choice, this was already the fastest tempering speed.

Next, Chu Duan spent four hours a day refining the sword intent and the power of mystery, and then took two hours to study and improve the second mudra, and the rest of the time was to practice swordsmanship, study the swordsmanship field and force control and power shaking techniques such as mountain strength, and also found a little time to practice the Heavenly Desolate Sword Codex.

His life was very leisurely.

Today is the seventh day after Chu Duan modified the Nine Turns Heart Seal Recipe into the Nine Turns Heaven Shock Heart Seal Formula, and Chu Duan was refining his sword intent with his spiritual intent.

Under the high-frequency vibration, the prototype of the sword spirit continued to vibrate, and the sword intent contained in it was also refined and purified again and again, and finally reached a limit.

Immediately afterward, Chu Duan immediately felt that the sword intent was different, and there was a feeling of refreshment.

"Is this a turn of sword intent?" Stopping to refin, Chu Duan carefully felt the sword intent at this time, and was immediately surprised.

The sword intent has successfully reached one turn, and the quantity has not changed in the slightest, but the quality has doubled, that is to say, the purity of the sword intent has doubled.

The increase in the strength of the sword intent is very obvious, especially for a person like Chu Duan, who is good at defeating the strong with the weak, this increase in absolute strength will make his strength increase significantly.

"The sword intent has reached one turn, and in a few days, the mystery should also be able to reach one turn, and at that time, the second type of mudra is almost complete. ”

There are a total of nine mudras for the nine turns of the heart seal, and each mudra corresponds to one turn, for example, the first mudra is used for one turn, the second mudra is used for the second turn, and so on.

Since Chu Duan had changed the first mudra of the Nine Turns Heart Seal, and the refining efficiency had skyrocketed, the second mudra had to be changed as well, not only the second, but also the third, fourth, fifth, and ninth.

However, the first mudra is the simplest, and the second mudra is relatively complex and more difficult to modify.

Restore the spiritual mind, begin to refine the power of tearing the mysteries, and then restore the spiritual mind after the end.

When the sword intent reached a turn, Chu Duan was in a good mood, left the bedroom and walked down the sword tower, came to the first floor, drew his sword, and began to practice swordsmanship.

He tried to inject a turn of sword intent into the sword, and every time he swung a sword, it was even more terrifying, and the power was obviously increased a lot, if he used force to control it, it would definitely be even more terrifying.

"When the mystery also reaches a turn, my strength will definitely be able to easily pass the sixth level of the puppet sword array, as for the seventh level......" Chu Duan thought for a while, he was not sure, the puppet sword formation was stronger than the first, he didn't know how difficult the seventh level of the puppet sword array was.

However, if the sword intent reaches a turn and the tearing mystery also reaches a turn, you can go and try it.

This thought was fleeting, and Chu Duan concentrated on practicing swordsmanship.

The spirit and spirit are one, and the mind is completely immersed in swordsmanship, Chu Duan is like washing the sword pool and comprehending it, starting from the most primitive basic swordsmanship practice, and the subtle changes over and over again, it is like experiencing the process of sword training from birth to the present, and gradually realizes.

Pure swordsmanship, not integrated into the sword element, not into the sword intent, not into the power of mystery, let alone using the field of swordsmanship.

Practicing and practicing, subconsciously, Chu Duan used the power of shaking the mountain.

Every time the sword came out, the sword body was vibrating at a high frequency, and it was impossible to see it with the naked eye, and even the ears could not hear the sound, because the speed of the shock had far exceeded the speed of sound propagation.

Unconsciously, Chu Duan entered a peculiar state, and he himself didn't notice it at all, just immersed in this peculiar state, over and over again, as if he didn't know how to get tired of cultivating swordsmanship.

Every simple action contains thousands of changes, and every sword is full of terrifying power because of the integration of the mountain-shaking energy, like destroying the mountain.

In the process of cultivation, the power of the mountain-shaking power has been improved little by little, and the level is constantly deepening.

At this time, outside the Sword Tower, a figure rushed quickly, approaching the Sword Tower like a gale, and it was Jiang Chuan, and I saw that his face was extremely anxious. (To be continued.) )