The so-called thunder tribulation is the training level that immortal cultivators need to endure whenever they break through a great realm on the immortal road.

That is, the so-called three calamities and nine tribulations in mortal legends, wind, fire and thunder.

They believe that this is a disaster that comes down to immortal cultivators who change their lives against heaven and earth and are punished by heaven and earth, but in fact, this is not the case.

If the Heavenly Dao does not allow the existence of immortal cultivators, then as long as you change the laws of the Heavenly Dao and cut off the aura, then even if you have talent, it is impossible for you to cultivate anything.

Originally, the so-called thunder tribulation was actually the explosion made by the martial artist when he opened the vein of Ren Du when he was practicing, like thunder, hence the name.

But in the world of cultivating immortals, the thunder tribulation is real.

This is the shackles of the level on the immortal road, and it is also a test, the strength of the thunder tribulation is determined according to their own cultivation and accumulation, after passing, you can borrow the thunder tribulation to quench the body, and the essence and spirit have been greatly benefited, if it fails, there is a risk of death.

Of course.

Ordinary immortal cultivators, trying to build a foundation, will not attract thunder tribulation.

If the breakthrough fails, the medicinal power will be converted into mana and accumulated.

Even if it succeeds, it will not cause any vision.

However, the use of heavenly materials and earth treasures to build a tunnel foundation will have a certain probability of attracting the heavenly thunder quenching body, which is also one of the reasons why the tunnel foundation building monks are more talented.

Because once the thunder tribulation is triggered, after successfully surviving it, the benefits obtained by oneself are difficult for other ordinary foundation-building monks to make up for it.

As for the legendary Heavenly Dao foundation, there are very few in the world, and although Su Chen has the conditions, he will not try it rashly.

Compared with the so-called little talent, he cares more about the immortal Dao species.

I have already stood at the pinnacle of immortality, and my cultivation is just to have stronger strength to protect myself and ensure that I can be at ease, there is no need to abandon the basics, in case it affects the growth of the Dao seed, then the gains outweigh the losses.

Three months later.

Su Chen has completed the preliminary sacrifice of the central banner in the furnace.

This treasure, although it has not yet reached the quality of the magic weapon, is also the best that surpasses the high-grade magic weapon, plus the four pieces of the four elephant flags, the value of the five pieces together will not be lower than the ordinary magic weapon, so it is also time-consuming to refine.

Counting the time, it is impossible to completely refine it at all.

Therefore, Su Chen didn't waste too much energy on this, just a preliminary sacrifice, to the extent that he could barely control the use, and then arranged the Four Elephant Flags in the four directions around his body, so that a small Four Elephant Formation could be formed.

The power is certainly not as powerful as the joint control of the four foundation building monks, but it is completely enough to protect itself.

Coupled with the wind and thunder seal that you carry with you, it can be said to be foolproof.

After making these preparations, Su Chen finally took out the Earth Mother Spirit Bead in the furnace space, and began to slowly refine and absorb the Earth Mother essence Qi in it, trying to break through and build a foundation!

The foundation of others can be as short as a few days or as long as more than ten days, and they can basically digest the medicinal power.

However, Su Chen needed to slowly refine and absorb the Earth Mother Spirit Bead first to ensure that every step was foolproof, so the process of this breakthrough was also infinitely lengthened by him.

Fortunately, he carried a large amount of pills with him, and he was refined and stored in his body in advance through the herb and wood pill qi, which could be extracted and replenished at any time, so it was not a problem at all to stay awake.

It took him almost a hundred days to completely refine the Earth Mother Spirit Bead, which was full of Earth Mother Essence Qi and the medicinal power that had been accumulated for a long time.

Su Chen barely felt any bottlenecks.

Directly crossed the limit of the tenth layer of qi refining, and the mana in the body surged, constantly compressed in the qi sea dantian, and finally fused with the earth mother essence qi, refining a purer liquid mana.

Suddenly.

Su Chen felt that the spread of his mana was like ripples and cleansing, and the mana yarn that lingered on the surface of his body also changed from a transparent phantom to a solidified one, and the defensive power and the effect of nourishing the flesh were further strengthened.

Meanwhile.

A large amount of earth mother essence gathered in the dantian in the body, at the same time, he felt that he and the ground under his feet, vaguely established a wonderful connection, close and familiar, every breath, as if he could draw strength from the ground, between the breath, the mountains responded, the earth mother essence in the body became more and more rich, and finally in the vast ocean of mana, converged into a golden mountain!

The sea of mana, the golden sacred mountain, and a round of scorching sun phantom immediately appeared above the top of the mountain.

Together, they form a magnificent and mysterious picture.

This is the foundation of his way.

Since then, Su Chen has completed the first step of building the foundation of the tunnel, not only has the mana been further advanced, but also completely absorbed and inherited the characteristics and effects of the Earth Mother Spirit Bead, so that it will be easier to master the magic spells of the earth system in the future, and he can also absorb the Earth Mother Qi that is separated from the ground at any time.

Meanwhile.

He also felt that clouds began to gather above his head, and flickering thunder faintly appeared.

It was a thunderstorm caused by the foundation of the tunnel.

But that's not the end.

At the same time as the thunder tribulation was brewing, Su Chen suddenly noticed that in the picture scroll of mountains and seas, a cyan lotus seed emerged, instantly devouring and absorbing all the earth mother essence qi accumulated in his body, and then, the lotus seed broke open and grew a rhizome, a tender green sprout, and gradually grew out!

"The Immortal Dao Seed was actually automatically triggered, absorbing the huge essence brought by the Earth Mother Spirit Bead. Looking at it like this, it seems that it is about to officially break out of the shell and enter a new stage. ”

Su Chen was shocked.

This change was not actively controlled by him, but it was indeed beyond his expectations.

Originally, the growth of the Dao seed is a thing to be happy about.

But it was at the critical moment of building the foundation and surviving the catastrophe.

This means that the Immortal Dao Seed has taken the initiative to participate, and his own Dao Foundation has also been upgraded from an Authentic Dao Foundation to a Heavenly Dao Foundation, so the intensity of the next Thunder Tribulation will definitely be raised to a higher level!

If it succeeds, of course, the benefits are endless.

But if he failed, he wasn't sure if the Immortal Dao Seed would be damaged because of this!

Although there is a high probability that the Dao Seed will not have much of a problem, at most it will return to its original growth state, but this is a matter of his own immortality, even if it is one in ten thousand dangers, Su Chen does not dare to be careless.

"This thunderstorm must be stopped!"

Su Chen raised his head and looked at the increasingly dense thunderclouds in the sky.

Originally, the foundation of the tunnel was built, at most it attracted a thunderstorm, the main role is to quench the body, the difficulty is not too great, as long as the person who can do this step is basically sure to deal with it.

But now the growth of the Immortal Dao Seed has made the foundation building judgment an extremely rare Heavenly Dao foundation building, and the three thunder tribulations are directly brewing.

To be honest, Su Chen was not 100% sure.

"Although I entered the Tao with martial arts, my body is strong, and I have been cultivating the robe to nourish my body, but if I resist three thunder tribulations in a row, it is estimated that I will be directly killed like that tree demon. We must find a way to weaken the power of the Thunder Tribulation, and then use this to temper it, which is the safest. ”

While the thunder tribulation had not yet fallen, Su Chen was quickly calculating in his heart.

Fortunately, he was well prepared.

At this time, he was in the Hundred Herbs Garden, and the environment was closed, so he didn't have to worry that the Thunder Tribulation would attract the attention of others.

Because the hundred grass drawings have been put away, the hundred grass garden at this time, from the outside, does not exist, and exists in another independent space.

Even if they went to Cangmang Mountain to look for it, they would not find any traces, even if it was the ancestor of the Qin family, it was impossible to intervene through the thunder tribulation.

First of all, external interference is ruled out, which is the best news.

Secondly, the enchantment of the Hundred Herb Garden will weaken the power of the Thunder Tribulation to a certain extent, and with his own Wind Thunder Seal and the Four Elephants Great Array, the first two Thunder Tribulations should be able to hold up.

As for the third course, it's a little more adventurous.

If he had a choice, Su Chen was willing to give up this catastrophe, even if it took a few decades to re-accumulate, and he didn't want to risk his life.

But now that the Thunder Tribulation has been brewing, unless he dies now, no matter where he goes, the Tribulation Cloud will come as scheduled.

"Because of the immortal Dao species, I have been cultivating for so many years, and I have been seeking stability, but after a long time, I will inevitably lose my courage and perseverance. Today's sudden thunderstorm is a crisis, but it is also an experience for my Dao heart! Gou, it's not cowardice, since the matter has come to this, what's the use of being afraid if you can only give it a go? ”

Come to think of it.

Su Chen's eyes returned to clarity.

At this time, there was a thunderclap in the sky, and thunder trembled.

An arm-thick pillar of lightning had already pierced the sky, like a silver snake passing through the barrier and slashing down.

"The wind is thundering!"

Su Chen hurriedly raised his hand, and the wind and thunder seal flew out from the top of his head, the storm roared, and the lightning overflowed, catching up with the falling thunder tribulation.

This wind and thunder is a thunder magic weapon, and it has the power to automatically absorb thunder and lightning, so under the first wave of impact, it absorbs a large amount of thunder tribulation power, not only does it not damage, but also increases some strength.

As for the remaining lightning tribulation intensity, it has been weakened to the point of safety.

Su Chen did not hesitate, sat cross-legged on the futon, took the initiative to disperse the surrounding guard light curtain, led the thunder light over, and tempered his whole body with thunder and lightning.

Cracking sound!

The electric light lingered around his body, like countless spirit snakes, Su Chen only felt that the flesh and blood organs of his whole body were constantly improving under the tempering of this power, and his physique had reached a higher level.

In the end, this power was completely absorbed by the bones, and the muscles and bones of the whole body became silvery and translucent, as if with the luster of a slight arc.

"It's so strong! The buff brought by this Thunder Tribulation Quenching almost doubled my physique. No wonder it is said that it is a genius who builds the foundation of the tunnel, because the refining effect of this thunder tribulation is worth more than the cultivation effect of ordinary people for decades. ”

Su Chen was secretly surprised.

At this time, the second thunderstorm followed.

This thunder light is much stronger and more powerful than the previous one.

But fortunately, he drove the Four Elephants Great Array in time, and the phantom of the Four Elephant Yuan Spirits emerged, surrounding his body, although the effect was far inferior to the previous Great Array, but it was completely enough to protect himself and resist the thunder tribulation of the Foundation Building Realm.

Under the protection of the Four Elephant Yuan Spirits, the second thunder tribulation was cut off by most of its power.

Su Chen took it down again, this time, the refining nourished was his own mana, the mana that had been liquefied, under the quenching of thunder and lightning, the volume was reduced by half, but the strength increased, and the liquefied pure yang mana, contaminated with the light of thunder and lightning, became more sacred and powerful.