Ling Chen retreated in shock, his face a little pale.

Just approaching that square space, in fact, he didn't suffer any physical damage, but his mental power fluctuated violently, which made his heart tremble.

Ling Chen stood blankly and stared blankly at the square space, the shock in his heart, like ripples on the surface of the water, getting bigger and bigger.

He had vaguely guessed what the square space was made of.

It is formless and substantial, but it can block the aura that enters the square space.

There is no physical attack, but it can cause his mental power to fluctuate.

If you guess correctly, that square space should be related to spiritual power.

Psychic power barrier?

When he was in the ancient martial arts realm, Ling Chen had heard that some of the great masters at the peak of the late stage of the mixed yuan had their spiritual power so strong that it was unimaginable, and they could release their spiritual power to form an invisible and qualitative spiritual power barrier.

For example, if a master of mixing elements talks to people, but he doesn't want others to know, he can use his mental power to block out the voice.

But even the most powerful hybrid master would never be able to use the spiritual power barrier to seal the aura, and there was no such legend in the ancient martial arts world!

The spiritual power barrier set up at the peak of the late mixed yuan period cannot cause other people's mental power to fluctuate!

If it is said that the square space is made of a spiritual power barrier, then the person who built the square space ...... Ling Chen wasn't sure if it was human...... The mental power is terrifying!

Far above the peak of the late stage of the mixed yuan!

Ling Chen didn't know how big the gap was from the peak of the late stage of the mixed yuan, but he believed that even if ten peaks of the late stage of the mixed yuan released their spiritual power at the same time, it would be difficult to build such a square space!

What's even more unbelievable is that the owner of the square space is not here, the aura in the square space is so dense that it glows, and the owner should have left for many years, but the spiritual barrier can still be maintained!

This shouldn't be an ordinary spiritual power barrier, I'm afraid it's spiritual power solidification!

The spiritual power was solidified, and there was no such statement in the ancient martial arts world, it was just Ling Chen's guess after coming into contact with the square space.

Can the human spirit be so strong?

Even if it was Ling Chen, his spiritual power far surpassed that of a martial artist of the same level, but he thought to himself that even if he cultivated to the peak of the late stage of the mixed yuan one day, he would not be able to build such a square space that could seal the aura!

The spiritual power is so strong that I am afraid that the aura within a few hundred miles can be easily condensed!

Under the Zhijing Cave, is there really a spiritual jade mine?

Previously, Ling Chen believed that there was definitely a spirit jade mine below the spiritual energy center, but now it seemed that the spirit jade mine might not exist.

Perhaps, it's just that the master here has condensed all the spiritual energy within a radius of hundreds of miles and sealed it.

With the terrifying spiritual power of the master, it can really be done.

Looking at the incredibly dense aura in the square space, Ling Chen drooled with envy and cautiously approached the square space again.

This time, Ling Chen didn't rush in, he reached out and touched it first.

I didn't feel anything, but the square space obviously began to deform under the touch of the palm, and it was visible to the naked eye, and the square space was recessed inward.

Ling Chen retracted his palm, and the square space suddenly returned to its original state.

The square space really doesn't have a physical attack.

However, if you want to break through the square space with the palm of your hand, you can't do it.

Ling Chen tried to draw out the spiritual energy in the square space, but as soon as his spiritual power moved, the spiritual power solidified in the square space immediately affected his spiritual power, and his spiritual power fluctuated violently again.

Ling Chen only felt palpitations and shortness of breath, and immediately stopped the operation of his mental power.

Ling Chen's face once again showed a look of shock, it was too powerful!

The spiritual power barrier that has been solidified for many years, he still can't break it!

This is still his spiritual power comparable to that of a Dan Jin master, if he is replaced by another martial artist, affected by the solidified spiritual power barrier, it is possible that the spiritual power will be directly wiped out!

Spiritual power is very important to martial artists, once spiritual power is completely wiped out, the path of martial arts will never be said, and people will become demented!

What a terrible mental power barrier!

After a few minutes, Ling Chen calmed down.

The aura in the square space is indeed breathtakingly dense, but if you can't enter the square space, it will be in vain to look at it.

Besides, the density of the aura outside the square space was enough for him to refine the tailbone in advance, so there was no need to stare at the aura of the square space.

Making a decision, Ling Chen retreated and stayed here, looking at the dense aura in the square space and not being able to absorb it, it was simply torture.

For the next few days, Ling Chen spent the next few days refining his tailbone in a dark cave.

It can be tempered four to five times a day, and after a few days, more than half of the entire coccyx has been completely jadeized, and the periosteum and bone have been replaced by aura.

On the fourth day, Ling Chen went out and had already eaten all the dry food he brought.

At the beginning, he was going to quench his tailbone in Zhijing Mountain, the huge Zhijing Mountain, there was no shortage of food, but when he entered Zhijing Cave, he relied on dry food to eat.

Ling Chen didn't delay much outside, made up for the demand, bought a new ticket to enter the Weaving Cave, and came to the cave in the canyon.

The middle part of the coccyx, which is thicker than the edges, is a little slower to quench, but by the tenth day, the whole coccyx is in a state of transparency.

Ling Chen spent another day consolidating the results of the quenching, and in the end, it took eleven days for the coccyx to be quenched!

As for the tempering effect...... Perfect!

The whole coccyx, if taken out, is a piece of jade of the highest quality, but the toughness is far from being comparable to any jade.

The aura wrapped around the coccyx bone marrow, a large amount of red bone marrow was activated, and Ling Chen's qi and blood not only surged, but the quality was also very different from the original!

Of course, his vertebrae have not yet been refined, and his qi and blood have not completely changed qualitatively, but even so, the upper limit of his spiritual power has also been greatly improved.

The increase is not as good as the increase in spiritual power that Shen Jingjing and Xiao Min brought to him in the full moon, but it is more than the sum of the tempered ribs and sternum!

"It's a pity that the time of the main competition of the martial arts competition is a little earlier, otherwise, Brother Chen will temper his spine in one go!"

"In less than a month, Brother Chen broke through from the middle stage of Huajin to the late stage of Huajin, and I asked you if you were convinced!"

"Brother Chen specializes in all kinds of disobedience!"

"If you break through to the late stage of Huajin, President Fu wants to kick Brother Chen again, it won't be so easy!"

However, even if there was enough time, Ling Chen was unwilling to temper his spine immediately.

The coccyx is perfectly refined, the qi and blood have a tendency to change qualitatively, and the upper limit of spiritual power has also been greatly increased, which can split the aura into more subtle pieces, and the degree of control over the power can also be higher.

At that time, if you come to refine the vertebrae, the effect of refining is better, and it is easier to temper.

Dispelling the idea of refining his vertebrae, Ling Chen continued to absorb the spiritual qi and restore his true qi to its peak state.

The coccyx quenching was completed, the true qi capacity was expanded, and Ling Chen officially broke through the peak of the mid-stage of chemical strength!

However, Ling Chen didn't leave in a hurry, instead walked towards the square space.

Now that the upper limit of his spiritual power has increased, he wants to try again, whether he can enter the square space.

If you can, next time Lao Tzu is arrogant again, he will break through the late stage of transformation in ten days!