After staying for about half an hour, Zheng Fei said goodbye to Yang Min and prepared to find a place to test the power of the [Heavenly Thunder Flint Stone].

The system said that the [Heavenly Thunder Flint Stone] could summon heavenly thunder, and the power was extremely huge, and one careless would cause a sensation, so Zheng Fei was very cautious about it and didn't dare to take it out for casual experiments.

During this time, Zheng Fei had been looking for people to ask about the nearby inaccessible places, and it was not until the fourth Luo Cheng said that there was an undeveloped karst cave in the northern suburbs of the mountain range, and Zheng Fei had the intention of experimenting.

The scenery of the mountains is very beautiful, and there are many kinds of animals, shuttling between the mountains and forests, you can see all kinds of poisonous insects and beasts from time to time.

According to Luo Cheng's instructions, Zheng Fei spent a lot of effort to finally find the cave.

For others, it is very difficult to walk in the mountains, let alone find caves, but for Zheng Fei, this place is like flat land, except for the search range is a little wide, and the entrance to the cave is somewhat hidden, there is no feeling at all.

Lighting the torch, Zheng Fei entered the inside of the cave.

The passage of the cave is narrow at first, and the ground is uneven, but after walking for a while, the passage becomes open and the ground gradually flattens.

After walking for about a few minutes, Zheng Fei came to a very empty square, and then lit up the surroundings with a few torches, and then the scenery inside the cave came into view.

Sky! It's beautiful!

The surrounding strange rocks are craggy, the dog's teeth are different, some are as sharp as knives, some are round as balls, and with the continuous sharp stalagmites above the cave, it gives people a fantasy feeling of being in another world.

No matter how much you make a noise here, no one will come!

Zheng Fei felt that this place was very suitable for experiments, so he took out the two black stones in his pocket, [Heavenly Thunder Flint Stone], and began to experiment.

Since it has the name of flint, and the place where this thing is found is the kitchen, don't think about it, it is naturally used to make a fire.

Zheng Fei has seen a lot of videos of survival in the wild, and he is naturally no stranger to the way of using flint and steel to make fire in ancient times.

In ancient times, people struck stones with pieces of iron to create sparks, which caused fires. The stone they used was called flint, which was the more common siliceous rock, and they were beaten with iron tools because iron tools were prone to sparks.

Zheng Fei didn't see the iron tools used to beat in the system, so he took it for granted that the purpose of producing sparks could also be achieved by striking with two stones.

He exhaled and controlled the power in his hand to tap the two stones. His force was very light, for fear of breaking the two stones with too much force.

With a click, two stones rubbed against each other, and a dusty spark suddenly fell out, and then an amazing scene happened.

I saw that the dust-sized spark seemed to have turned into water-absorbing cotton, and as the distance increased, the spark instantly became larger, and in the blink of an eye, it turned into a lightning bolt with a white light.

The lightning was like an electric snake, winding and flipped straight ahead. Before Zheng Fei could react, it had already crashed into a rock.

There was a loud "boom", the rocks splashed, the ground shook slightly, the heat wave hit the face, and then the cold wind came from behind.

Zheng Fei was frightened, but when he came back to his senses, he found that the stone had already been torn apart, and the ground was left in a dark mess.

This......

Zheng Fei couldn't describe his shock in words, knowing that he only used the lightest force to rub out a spark. A single spark can have such power, if a little force rubs out hundreds, thousands, or even tens of thousands of sparks, what kind of scene will it be?

Imagining countless bolts of lightning flying out of his hand, like a god, Zheng Fei felt that his brain capacity was not enough!

it! With this thing, doesn't it make me a combined version of the thunder male and electric mother!

After a long time, Zheng Fei finally calmed down the agitated mood in his heart and was ready to try again, but this time he did not aim at the target, but tested its attack distance towards the depths of the cave.

It may be that the relationship is too tense, this time he didn't control his strength well, only heard a "click", and more than 20 sparks floated out.

I saw that more than 20 sparks instantly turned into more than 20 thunder snakes, twisting and entwining their bodies with each other and rushing into the depths of the cave. They were so loud that the moment they appeared, they made the air feel crispy and numb, and Zheng Fei felt terrified even when he looked at them.

The moment he saw the thunder snake, Zheng Fei shouted badly, after all, a spark represents a lightning, and more than 20 sparks are more than 20 lightning, this amount is definitely not something that a small cave can bear, you must know that this is a cave, and there are dense stalagmites on it, if the mountain collapses, or all the stalagmites are shaken down, then he will not die here?

Zheng Fei's face changed, and before he could react, more than twenty bolts of lightning suddenly dissipated in the air hundreds of meters in front of him.

The violent rumbling sound caused dozens of stalagmites in front of him to fall, and at the same time, a strong heat wave rushed to his face, making Zheng Fei's originally stagnant heart suddenly beat wildly.

There was also a faint fishy smell in the air, and Zheng Fei knew that when lightning cut the air, the fishy smell caused by ozone was formed.

Seems to be fine!

Zheng Fei, who was stupid, came back to his senses and suddenly gasped, after all, although his body has become stronger, he is still a human being, and if he lets the cave collapse, it is not something he can bear.

It took a few minutes for Zheng Fei to calm down his beating heart, and at the same time wondered how the lightning could suddenly disappear.

The speed of lightning is equal to the speed of light, and it can reach a distance of about 300 million meters in a second in a vacuum, and even if the time it takes for Mars to expand into lightning may slow down the speed of lightning, it will not even be able to touch the walls of the cave and disappear.

Zheng Fei visually measured the distance of the lightning flight just now, which was only about 200 meters, even if the speed of the lightning formation was reduced by 100 times due to the expansion, the speed of 3,000 kilometers per second was not a vegetarian.

Zheng Fei looked around and found that the rock wall was very wet, and the air also gave people a slimy feeling, Zheng Fei suddenly felt that it was due to the moisture in the air that caused the spark to go out, so the lightning also disappeared?

Although Zheng Fei didn't understand the truth, he also had a little idea, that is, Mars is closely related to lightning.

If you want to compare it, just like when the general substance burns, there will be heat around it, but the heat formed by the [Heavenly Thunder Firestone] is replaced by lightning.

On the other hand, if the [Heavenly Thunder and Flint Stone] is extinguished, the lightning will also disappear, and if you take into account the humidity of the air here and the water vapor that Mars touches when it travels away, then the reason for the disappearance of the lightning can also be explained!

If the entire [Heavenly Thunder Flint Stone] is ignited, will the lightning rush out of the earth and fly into the universe!

Zheng Fei wiped the sweat from his head, thinking about the perversion of this thing, and at the same time had a deeper understanding of the props produced by the system.

In any case, this thing must be used with caution, especially not with force, if something goes wrong, it will cause unparalleled damage!

Thinking of this, Zheng Fei cautiously tried a few more times, and felt that it was almost there, so he left the cave.

It was already dark outside, and the summer night in the mountains was especially beautiful, with the sky full of stars, and the full moon shining brightly, like a quiet beauty, quietly looking down on the dark earth.

Zheng Fei took out his mobile phone and looked at the time, and at this moment, the mobile phone suddenly rang.

Zheng Fei wondered, can a signal also receive network information?

He unlocked the lock screen and found that there was a prompt message for a certain treasure software left on the screen.

"Buyer 'super_saver' has already purchased your [Black Jade Intermittent Water], please ship it as soon as possible!"

Yo! The first buddy to buy [Black Jade Intermittent Water]! Visionary!

Zheng Fei was a little excited, after all, he was a new seller, and 2988 yuan was not something that ordinary people would dare to spend on novice sellers, not to mention who knew if this thing was reliable or not!

Zheng Fei clicked on a certain treasure software, waited for a long time, and finally refreshed the buyer's information, but the other party's delivery address made Zheng Fei dumbfounded.

I rub! The first guy to buy [Black Jade Intermittent Water] was actually in Houston, the United States, and his buddy's business went abroad?