After leaving a message to his mother, he quietly retreated into the mountains, but did not go far, and stayed at the mountain temple.

Zhang Jiuxiao's top priority now is to refine the eighteenth form of entry and reach the peak of the mortal realm, but Zhang Jiuxiao was not dazzled by the excitement, and breaking through immediately may improve his strength, but it is not a good thing for the future. A solid foundation is the basic condition for becoming a strong person, and each realm needs to be taken one step at a time.

"Little Shuling, if I am in danger, will you save me?" Zhang Jiuxiao suddenly asked.

"Definitely not!" the little scholar shook his head quickly.

"Righteous fellow!"

"What does it mean to be unrighteous? Although the pure-blooded human race has unlimited potential, they are all stupid, why can't I find a person with peerless talent to be the inheritor after you die? You must know that although this seat has vowed to teach the pure-blooded human race, it is only teaching, and there is no need to live and die with you. "The little scholar is righteous.

"Damn!" Zhang Jiuxiao grinded his teeth, "Then tell me, how can I polish my physical body to the limit and let the foundation of the mortal realm reach the limit?"

Xiao Shuling was silent, he had no reason to shirk the inheritor's request.

Extreme polishing of the body, not all of the inheritors of the holy book in the past have done it, and I can't imagine that this junior has such ambitions.

"Find a deep pool, and I will teach you to use the power of the earth, turn on double gravity, and temper your body at the bottom of the pool. ”

In the deep valley of the back mountain, there is a reservoir, and the deepest part is three or four zhang.

Zhang Jiuxiao came to the edge of the waterhole, and under the guidance of the little scholar, jumped into the water.

"Open the spinning light, plant the top door, seal the Yao Pool, rotate and open, double the gravity!"

Zhang Jiuxiao, who was in mid-air, suddenly fell at a rapid speed, "bang" into the bottom of the water, and sank to the bottom of the pool like a heavy stone.

Double gravity, equivalent to a person carrying more than 100 catties, jumping into the water and sinking directly to the bottom of the pool.

The advantage of increasing gravity is that the force is evenly applied to every muscle, so that all parts of the body are tempered.

With one breath, Zhang Jiuxiao began to practice boxing quickly underwater!

"Whew!"

The simplest punch, but with underwater resistance and double gravity, it gets extremely tough.

Zhang Jiuxiao only threw a dozen punches, and he felt sore, but Xiao Shuling didn't speak, he couldn't stop, he could only keep punching.

The intense pressure on the body, combined with the pain of being unable to breathe due to the pressure of the air in the body, makes it difficult for anyone to resist.

The mortal realm shows that he is still just a mortal, but his strength and physique are slightly stronger than ordinary people!

"Little Shuling, I can't bear it anymore!"

Zhang Jiuxiao held his breath while swinging his fist, and said angrily.

However, Xiao Shuling just looked at it coldly, and didn't look like he agreed at all.

With double gravity turned on, even if Zhang Jiuxiao wanted to surface, he couldn't do it at all.

Zhang Jiuxiao's face was red and his eyes were bulging, but he could only keep punching and kicking, and he insisted on it with difficulty.

"Little Book Spirit...... Hmmm......"

Zhang Jiuxiao just wanted to speak, but a mouthful of water poured into it, choking him and immediately closing his mouth.

Xiao Shuling still looked at it coldly, and there was no reaction when he connected it.

Zhang Jiuxiao was in a hurry, and after throwing dozens of punches one after another, the last trace of air in his body was also consumed.

The feeling of dizziness hit his heart, and he inertly mobilized the strength of his whole body, and continued to swing his fist, his head looking towards Xiao Shuling.

The latter looked at him expressionlessly with big round eyes, and for some reason Zhang Jiuxiao faintly felt that this guy was snickering.

"Oops...... I was deceived by Xiao Shuling...... This guy is hell-bent on killing me...... Another talented master......"

This was Zhang Jiuxiao's last thought, and in the next second, he fainted to death.

Without the control of the spirit, the double gravity disappeared automatically, and the little scholar's wings flickered, grabbing his ears and rushing out of the water like an arrow.

This time, he was not idle, he actually shook his body, turned into a slender silver needle, and pierced Zhang Jiuxiao's body with thirty-nine needles.

Zhang Jiuxiao, who was in a coma, groaned happily, and his body stretched left and right, seemingly extremely comfortable.

"Bang Bang!"

After a long time, Zhang Jiuxiao opened his eyes in a daze!

saw Xiao Shuling standing on his forehead, his two hands getting bigger, and he slapped him hard in the face.

"Get up, get up, keep exercising!"

The little scholar shouted while fanning, like a legendary demon instructor.

"I'm not dead yet...... Hey, it's so comfortable, I seem to have an inexhaustible amount of strength in me. ”

Zhang Jiuxiao stood up, moved slightly, and suddenly felt refreshed, and couldn't help but jump up.

He faintly felt that several points in his body were opened, and endless potential diffused from them, and his whole body was full of explosive pure power, which was several percent higher than before.

These tricks are all human treasures, which are not opened at ordinary times, but once they are opened, the future potential is endless.

"Continue to refine your body until you reach the limit of the mortal realm!"

Xiao Shuling flew behind him and kicked over, and Zhang Jiuxiao, who was more than 100 catties, was kicked away by him.

Zhang Jiuxiao was depressed, but he didn't have time to think about it, so he immediately turned on double gravity again, jumped into the reservoir, and continued to practice boxing underwater.

The whole day passed like this, every time he had to force Zhang Jiuxiao to be exhausted and pass out by himself!

I'm going to be forced to faint every time!

This kind of extreme exercise is very effective, and with Xiao Shuling's familiarity with the human body, it will break his potential every time he passes out, so that he can wake up and recover his strength.

If other people exercise like this, they are afraid that they will die of exhaustion after two or three times, and they simply cannot withstand such a harsh extreme exercise. But Zhang Xiaoyou only absorbed the cultivation of the black crow essence, although he refined the pure demon Dao power into his body, there were very few that could be used, and it was this extreme refining that allowed all these external forces to be fused, allowing him to reach the limit of the mortal realm in a short period of time.

It is precisely because of the pure cultivation of the black crow essence that the little book spirit dares to perform this extreme refining method!

By the evening of the next day, when Zhang Jiuxiao's body felt numb to this kind of exercise, he finally felt that he had reached the top - reaching the limit of the mortal realm!

In just two days, under the extreme squeeze and black crow refinement, his strength has nearly doubled!

"From now on, change the tempering method and stir in the water instead!"

Xiao Shuling didn't let him immediately refine the eighteenth form to break through to the peak of the mortal realm, but gave a new order!

Strange command - jump into the reservoir yourself, stir the water with your hands and feet, and make them spin with yourself!

This is not difficult, but the average person can stir the water in a tank with their hands to form a whirlpool and make it spin constantly!

But the little scholar's request was to stir the water of a reservoir and spin it alone!

Grass, is this possible?

No way!

When pigs fly!

But Xiao Shuling ordered like this, naturally he had his reasons, Zhang Jiuxiao couldn't, so he had to do it.

With his current strength and speed, with the stirring of his hands, he could form a whirlpool in the water, about two meters in diameter.

This is already his limit, and if he wants to expand, he can't do it!

"Can you do it with your physical strength? Fool, use your qi and power?" shouted the little scholar.

"Qi and potential?"

Zhang Jiuxiao looked very confused.

On that day, he fought with Luo Zhutou, and the momentum he used was only inadvertent, and it was naturally displayed under pressure.

Now I want to do it again, but I can't do it!

Zhang Jiuxiao's talent is not good, but his comprehension is extremely high, so he calmed down at the moment and thought carefully about his qi and potential.

Gas, flowing wind!

potential, unbalanced pressure!

It is impossible to appear "potential" out of thin air, nor can "qi" suddenly appear, there must be "potential" in order to have "qi", so how to generate "potential".

In the mortal realm, power cannot be released, let alone form a "potential", only the spirit can be released, and it is possible to form a "potential" outside the body!

Inadvertently, in Zhang Jiuxiao's mind, he began to simulate the existence of "potential", and this simulation rippled away!

"Whew!"

A gust of wind formed out of thin air in front of him!

"That's true!"

Zhang Jiuxiao was overjoyed, he couldn't imagine that the potential was so simple, but he had imagined it countless times for so many years, why had he never felt the potential?

He didn't know that the potential was the result of the release of spiritual power, and the mental power of ordinary people was too weak to be released at all, and even if it was released, it could not form a potential.

Only by breaking several limits in the human body can we activate and strengthen the spiritual power, and if you want to release the spiritual power, you also need to open up the potential of the brain domain.

This is not something that ordinary people can do at all, only by reaching the half-step innate realm can there be a slight chance!

And this slightest chance is very slim, if it is illegal, nine out of ten people will not be able to do it in their lifetime.