After arranging everything, Zhang Cheng and the others were ordered to retreat.

Su Yi also began to study the exercises that originated from the Thundering Tower.

Cultivating this technique, in addition to improving one's cultivation, there is another extremely powerful sword formation, which is called [Thundering Sword Formation] in the book.

As long as you cultivate this sword formation, with the innate attack power of the Thunder Spiritual Root Cultivator is much stronger than that of other Spiritual Root Cultivators.

Dealing with monks of the same rank can be described as a piece of cake.

It is even recorded in the book that the Thundering Ancestor, in the late stage of Jindan, when he was in the realm of Great Perfection, relied on this sword formation to fight the early monks of the Yuan Infant without falling behind.

Such a powerful sword formation naturally aroused Su Yi's great interest.

After some inspection, cultivating this sword formation requires a sword that is in line with the mind, and it is best to make it with thunder attribute materials.

The power of the sword array also varies greatly with the power of this sword.

The more powerful the Natal Sword is, the more powerful the cultivated sword array will be.

Seeing this, Su Yi remembered the purple and green thunder sword that had been dormant in his body, almost without movement.

This sword has been kept in the sword pond for nearly 10,000 years, and its power is naturally needless to say.

But the only fly in the ointment is that this sword is not Su Yi's heart-to-heart natal flying sword.

Not only that, but this sword once had an owner, but the master fell.

I don't know if it's because of this, the purple and green thunder sword in his body has never been very willing to deal with Su Yi.

As the monk surnamed Qin said at the beginning, this sword was just residing in Su Yi's body.

Su Yi was helpless about this, but fortunately, after reading a large number of classics left by the Thundering Ancestor in the Thundering Sect, Su Yi finally found a way to erase the mental imprint left on the magic weapon by the original owner of the magic weapon.

This kind of exercise requires Lei Linggen monk to cultivate to the Yuan Infant Stage, and then use the Yuan Infant of Dacheng to continuously temper the magic weapon with the infant fire, and finally achieve the purpose of eliminating the remaining marks on the magic weapon.

When Su Yi saw this, he couldn't cry or laugh.

He is indeed a primordial infant monk at this time, and he is also a thunder spirit root, but he is more strange, and what is condensed is a ghost baby.

Infant fire is a kind of spiritual fire that is spit out by the primordial infant urging the power of the origin.

This kind of spiritual fire can be used for refining weapons, and it can also be used for alchemy, which can be described as extremely wonderful.

However, spitting infant fire requires a large amount of origin power, and even a Great Perfection monk in the late stage of the Yuan Infant with abundant mana cannot spit out infant fire alchemy for a long time.

But Su Yi's difficulty is not here.

It is written in the scriptures that the entire process of erasing the residual imprint is very slow, it takes a lot of time, and the infant fire consumed each time is very small, even if Su Yi is now a Yuan Infant junior monk, he can spit out enough infant fire to achieve the purpose of erasing the imprint.

But Su Yi's Yuan Infant is a ghost baby.

Ghost babies can also spit out baby fire, but the baby fire they spit out is something called Nether Ghost Fire.

Nether ghost fire can be used to refine the elixir needed for ghost cultivation, or it can be used as a refining weapon fire for ghost cultivation.

Once the Netherworld Ghost Fire is contaminated with the magic weapon of the Terran monk, not only will it not achieve the purpose of tempering the magic weapon, but it will slowly erode the origin of the magic weapon of the Terran monk, so that the magic weapon will gradually become undamaged and turn into a pile of useless scrap copper and rotten iron.

Su Yi naturally didn't want the powerful Purple Green Thunder Sword in his body to turn into a pile of useless scrap copper and rotten iron.

And rerefining a thunder-attribute natal flying sword is not only difficult to find materials, but also requires a lot of time and energy.

At present, the best way is to erase the remaining marks on the Ziqing Thunder Sword, so that the Ziqing Thunder Sword can completely become Su Yi's natal flying sword.

To do this, it is naturally impossible to rely on the ghost fire of the ghost baby in the body.

But Su Yi also had a golden thunder attribute golden pill in his body.

As long as this golden pill is also condensed Yuan Infant, then at that time, Su Yi will have a pure thunder attribute Yuan Infant who can spit infant fire.

It is not difficult to do this, it is equivalent to cultivating an out-of-body incarnation.

It only takes a little time, and a lot of elixir, to do it.

And since Su Yi had already broken through the bottleneck of the Yuan Infant Stage, cultivating the Second Yuan Infant did not need to break through the bottleneck again.

Comparatively speaking, cultivating the second primordial infant was much faster than the first primordial infant.

Su Yi also looked for some exercises for cultivating the incarnation outside the body in the library of the Thunder Ming Sect.

At this time, the library of the Thundering Sect was in the Thundering Tower, and if Su Yi wanted to read it, he only needed to move his mind.

Su Yi took out several exercises for cultivating incarnations outside the body and began to study them carefully.

。。。。

Time flies, and in the blink of an eye, eighty years have passed.

In the past 80 years, Su Yi has not stepped out of the second door, and he just wants to cultivate the second yuan baby.

During this period, the Thundering Sect recruited talents, especially those who were gifted in formations.

Not only does it have a spiritual root, but as long as it has a unique formation, you can join the Thundering Sect.

For a time, many mortals flocked to it.

After all, if ordinary mortals didn't have a spiritual root, they wouldn't be able to cultivate at all, and they wouldn't have any intersection with the Immortal Cultivation Sect.

But the Thundering Sect has opened a gap, everything that wants to be cultivated, you don't even need a spiritual root, as long as you have enough formation talent.

In the short period of eighty years, because of this rule, the number of disciples under the Thundering Sect has increased by nearly 10,000.

Of course, not all of these people could enter the Thundering Tower to cultivate.

Inside the Thundering Tower, there are not only a large number of cultivation resources, but also because of the Spirit Gathering Formation in the Thundering Tower, the spiritual energy in the tower is abundant, and the cultivation speed is one point faster than outside.

All the gifted new disciples regard being able to enter the Thundering Pagoda to cultivate as the first goal of entry.

And the disciples who were originally in the Thundering Tower lived a life of a good and wandering Lingzhifu.

I have to say. Farming is very addictive.

Originally, he was very reluctant to be a disciple of Lingzhifu, but after the eighty years of adaptation, he has become a Lingzhifu completely, and he doesn't plan to change careers.

At this time, in the Thundering Tower, a large number of colorful spiritual grasses and spiritual flowers are in full bloom, purple and red.

The faint medicinal fragrance refreshes people's hearts and spleens, as if you can live for several more years if you take a few sips.

In the spiritual field, a group of disciples of the Thundering Sect were busy taking care of the spiritual herb elixir, helping the spiritual herb elixir weeding, insect control, and fertilization, and they were very busy.

Inside the Thundering Tower is a harmonious idyllic scene.

Outside the Thundering Tower, Su Yipan sat on the futon with his eyes closed.

A baby floats in mid-air with a flash of lightning.

Seeing that this baby looked exactly the same as Su Yi, at this time he looked at his body excitedly and muttered to himself: "It's still this Yuan Infant to be restrained." ”

As soon as he finished speaking, the baby waved his hand, and a large number of arcs of electricity poured out, knocking a black hole into the floor of the room.

A moment later, a flash of yellow light flashed in the black hole, and the ground repaired itself.

A formation was arranged in this room, and even if Su Yi turned the room upside down, no one outside would know about it.

Su Yi silently closed his eyes, feeling the inexplicable rhythm between this primordial infant and his body.

He himself is a Thunder Linggen Monk, and it is not uncommon for him to condense a Thunder Attribute Yuan Infant.

Moreover, the thunder attribute primordial infant turned out to be stronger than the ghost infant condensed for the first time, and it was also more suitable for his own body.

Gradually, Su Yi had an idea in his heart, that is, to let the Lei Attribute Yuan Infant be his first Yuan Baby.

And the ghost baby is good as the second infant of the incarnation outside the body.

Having said that, the transition between the first and second infants is not an easy task and can take decades, if not centuries.

Su Yike didn't have so much time to waste.

He also had to hook through the purple and green thunder sword in his body, eliminate the mark in this sword, and make this sword completely become his natal magic weapon.