Traveling through the Immortal Cultivation World: I Use Solar Energy to Cultivate

During these ten years, Wang Bin did not focus solely on the research of the solar energy conversion array. He also created the Thunder Demon Pearl.

The second-level material of the outer part of this Thunder Demon Pearl is made by mixing Thunder Spirit Crystal and Xuan Yin Iron.

According to his own ideas, Wang Bin also added several other metals into it. He fully hoped that through this alloy, the Thunder Bead would be able to effectively isolate lightning and accommodate more lightning energy.

After all, in his previous life's understanding, alloys often have better performance, hardness, and higher cost-effectiveness.

However, reality dealt him a heavy blow.

I thought that the alloy I had carefully improved and manufactured would greatly enhance the power of the Thunder Bead, but the result was the opposite of what I expected.

The power of the Thunder Bead created by Wang Bin can only be regarded as a disposable hidden weapon of the initial stage of the second level, and can only cause fatal damage to cultivators in the early stage of foundation building.

This result greatly confused Wang Bin. He was full of doubts and initially thought that there was a problem with his improvement of the metal exterior of the Thunder Demon Pearl.

So, he decided to make a new Thunder Demon Pearl according to the normal Thunder Demon Pearl refining process, trying to find out the problem.

But the result this time was even more disappointing to him. The power of the newly refined Thunder Bead was even smaller. It could only kill Qi-refining cultivators. It could not kill cultivators in the early stage of Foundation Establishment.

This outcome almost made Wang Bin completely give up the plan to develop the Thunder Demon Pearl.

After all, he used second-level spiritual materials and spent a lot of effort and resources, but in the end he only refined a first-level hidden weapon. This is obviously a very unprofitable deal. It would be more cost-effective to directly purchase the Flame Explosion Talisman.

Wang Bin racked his brains but couldn't find the reason.

Fortunately, Du Juan helped him find some valuable information about the Thunder Demon Pearl from the Four Seas Merchant Alliance.

Wang Bin was overjoyed and after reading it carefully, he suddenly understood.

It turns out that the power of this Thunder Bead mainly depends on the power of thunder and lightning contained in it.

The Thunder Evil Pearl contains the Yin Thunder of Guishui, and this Thunder Evil Pearl is the unique hidden weapon of the Lei family in the Tianyuan Empire.

In order to produce Guishui Yin Lei, the practitioner not only needs to have thunder spiritual roots, but also has to learn the Lei family's unique skills.

Moreover, the higher the cultivator's cultivation level, the more powerful the Guishui Yin Lei he releases will be.

As for why the Lei family can produce members with thunder spiritual roots in every generation, this makes many people deeply curious, but the Lei family has always had powerful cultivators in the God Transformation Realm in charge.

In addition, it is said that the Thunder Beads made by the cultivators in the Spirit Transformation Realm can directly kill the cultivators in the Nascent Soul Realm, so ordinary people dare not have any improper thoughts about the Lei family.

After learning the news, Wang Bin had no choice but to temporarily give up the idea of ​​continuing to make the Thunder Beads.

After all, the lightning released by his own lightning array was just ordinary lightning, and its power was really limited.

Time flies. One day two years later, Wang Bin suddenly had a flash of inspiration and came up with a different way to enhance the power of the Thunder Bead.

He couldn't help but secretly regret that he was a science student in his previous life. Why did he keep worrying about the lightning power in the Thunder Bead, but overlooked a key point?

The destructive power of a bomb lies not only in the impact it generates, but also in the iron sheet outside it that is deadly!

Wang Bin acted quickly and began to improve the Leishazhu.

He decided to thicken the metal layer on the surface of the Thunder Bead. His idea was very clear: the thicker the metal layer, the greater the impact force would be when the Thunder Bead exploded.

After some effort, the power of the improved Thunder Bead has indeed been improved to a certain extent, and it can kill a cultivator in the middle stage of Foundation Establishment.

However, compared with the real Thunder Bead, its power is still far behind, and this improved method consumes ten times as much materials as the normal Thunder Bead, so the cost-effectiveness is too low.

Although this is not bad, Wang Bin doesn't lack this little money. He can't use it himself, but he can use it for his woman and son to protect themselves.

But he still wanted to improve it.

Wang Bin even wanted to try using the formula of "one sulfur, two nitrates and three charcoal" to make it.

But he was also worried that the formula was too simple and could be easily learned by others. Moreover, he was not sure whether the power of black gunpowder could have any effect on foundation-building cultivators.

The main reason is that he has never found the key material such as sulfur around him, otherwise he would really have to give it a bold try.

However, Wang Bin had taught himself the knowledge of refining for more than ten years. Deep in his memory, the obsidian he saw at an auction ten years ago suddenly emerged.

At that time, he was attracted by the amazing sharpness of obsidian, and he specially went to Du Juan to buy 200 kilograms of it.

He rummaged through his storage bag to find the obsidian and carefully tested its sharpness again.

The second-level fox skin was as thin as thin paper in front of the obsidian blade and was torn into pieces with just one cut.

Although obsidian is somewhat brittle, Wang Bin feels that this problem is not unsolvable.

After Wang Bin’s careful improvement and design, a new “sea urchin” version of the Thunder Bead was born.

The production method is to inlay more than a dozen spikes made of obsidian on the outside of the Leishazhu. In order to overcome the defect of the brittle texture of obsidian, Wang Bin also specially wrapped a layer of metal on the outside of the spikes, leaving only the spikes exposed.

When the "sea urchin" thunder bead was completed, Wang Bin decided to test its power.

He guessed that the power of this new hidden weapon should not be underestimated, so he was extremely cautious when testing it.

He deliberately ran to a place nine hundred meters away, dug a hole underground, and then used his spiritual sense to remotely control the explosion experiment.

With the loud bang of the "Sea Urchin" Thunder Bead, the powerful impact force generated by the explosion instantly scattered the obsidian spikes in all directions like flowers scattered by a fairy.

Two black rays flashed by, and the spiritual shield released by the shield talisman that Wang Bin used for testing was instantly pierced by two finger-sized holes by the sharp spikes, and then the entire shield shattered.

Wang Bin saw this scene from a distance and couldn't help but secretly feel lucky that he had just run far enough, otherwise he would have to pay a heavy price for this experiment, or even sacrifice his life for it.

You know, the shield talisman of the foundation-building period can withstand the attacks of many foundation-building monks, and its defense is definitely not bad.

Unexpectedly, under the attack of this "sea urchin" thunder bead, it was pierced through instantly. The attack power definitely exceeded the attack strength of ordinary foundation-building cultivators.

Wang Bin was so shocked that he couldn't express it in words, but his curiosity was also completely aroused.

In order to find out the true power of the "Sea Urchin" Thunder Bead more accurately, he gritted his teeth and decided to bear the pain and waste the precious Hunyuan Yuling Shield Talisman.

After careful consideration, he was still not at ease, so he used five shield talismans in succession behind the Hunyuan Yuling Shield, adding layers of defense, and then conducted the explosion experiment of the Leishazhu again.

As the Thunder Bead exploded again, the obsidian spike instantly turned into a black light, and pierced through the Hunyuan Yuling Shield like a black lightning.

Then it penetrated the shields formed by three shield symbols in succession, and the obsidian spike finally shattered when it hit the fourth shield.

Wang Bin widened his eyes in the distance, staring at the obsidian fragments that were flashing with black light, his heart filled with excitement.

He knew that this Hunyuan Yuling Shield was not an ordinary defensive magic weapon. Even a cultivator in the middle stage of the Golden Core Realm would have to spend a lot of effort to break it.

But he never expected that this "sea urchin" thunder bead was so powerful that it pierced it instantly with just one strike.

At this moment, Wang Bin deeply realized that he had greatly underestimated the value of this obsidian.

An idea instantly flashed through his mind. No, he must let Du Juan buy all the obsidian in the Sihai Merchant Alliance warehouse.

But as soon as this thought came to his mind, he immediately calmed down.

No, no, if I buy too much at one time, it will definitely attract other people's attention. Besides, the price of obsidian is not cheap. One medium-grade spirit stone can only buy one kilogram.

His current reserves of spirit stones were simply not enough to support the cost of purchasing large quantities of obsidian, and he absolutely could not reveal his intentions because of a momentary impulse.

Moreover, the black thorns on each "sea urchin" thunder bead do not actually require too much obsidian, just one pound is enough.

Wang Bin counted the remaining obsidian in his hand and found that it was enough to make more than a hundred "sea urchin" thunder beads.

After all, this obsidian has no spiritual energy, so when making spikes, it can only be polished into a needle shape manually, and this process will inevitably waste some materials.

Wang Bin secretly estimated in his heart that this "Sea Urchin" Thunder Bead, with its powerful power, definitely reached the level of a third-level top-level hidden weapon.

He believed that the shield or body of a Jindan cultivator would be absolutely unable to withstand the attack of this obsidian and would definitely be penetrated instantly.

But he still had some doubts in his heart. For a Nascent Soul cultivator, the situation was not easy to judge.

After all, Nascent Soul cultivators are very powerful. Unless this "Sea Urchin" Thunder Bead can suddenly explode when the enemy is least expected and allow the obsidian needle to penetrate their Nascent Soul, it is almost impossible to kill a Nascent Soul cultivator.

And this is under the premise that the Nascent Soul cultivator has not cultivated his physical strength to the fourth level of treasure body.

As for whether the sharpness of this obsidian can pierce the body of a Nascent Soul cultivator, Wang Bin does not have a definite answer in his mind. All this still needs further exploration and verification.