"Stone skin technique, that is, taming earth substances, making them form stone armor, and protecting your body," Lu Ze said, "Cultivating stone skin techniques to the depths is said to be able to condense incomparably hard stone armor, which is invulnerable." However, we can't conjure up earthly materials out of thin air, and we must have raw materials before we can form stone nails. ”

Shikazawa grabbed a handful of dirt on the ground and used the Stone Skin Technique, which very obediently flowed on her arm, condensing into a crust of earth.

"The soil here is red clay, not a very good material, not very easy to control, but the sand is different." Shikazawa leaned down to pick up a handful of sand again, and used the stone skin technique again, and the sand turned into a dense shell that covered Shikazawa's body.

"Sand is harder than dirt, so the stone armor is stronger. However, the stone armor technique I usually use will not use these two things, but use the stone tablets that I usually use to nourish with demonic power for a long time. ”

Shikazawa let the earth and sand armor fall off her arms, and used the stone skin technique again, this time, some stone chips grew directly from her body, covering her whole body, making her look like an armadillo.

"Can I punch you?" Xu Wenshan suddenly asked Lu Zedao.

Lu Ze hesitated and said, "If you're really angry, just hit it." She thought that Xu Wenshan was still angry about the demon cultivator.

Looking at the little dot in front of him, Xu Wenshan's heart softened and said, "I'm not angry, I'm here to test the strength of the stone skin technique." ”

After explaining clearly, Lu Ze understood, and kindly reminded Xu Wenshan to be careful when fighting, otherwise it would hurt very much.

She is very confident in her stone armor.

Xu Wenshan mobilized the demonic power in his body and mobilized the muscle power to the maximum, and the demonic energy rose around him, looking awe-inspiring.

His current physical strength has surpassed the limits of human beings, this is the power of the youkai, which is comparable to the ability of a Qi cultivation period cultivator.

"Smack!"

This powerful punch hit the stone armor on Lu Ze's body, but it didn't move.

Xu Wenshan collected the demonic power, and the demonic aura that permeated his body died down. He looked at his fist, and the joints were slightly red and painful.

Although the strength of his body has been greatly improved after becoming a demon cultivator in the forging period, it is still not as hard as a hard stone.

Lu Ze said: "These stones are the hardest stones I have found since I have cultivated for 200 years, and they are very difficult to destroy. I suggest that you find the earthy materials that you have in hand as soon as possible, receive them in your body and warm them well, and spend decades to cultivate them into indestructible stone armor. ”

Xu Wenshan smiled, the hardness of the flesh is naturally not comparable to that of a stone, but if it is said to be indestructible, it is impossible.

He looked at it, and the stone armor on Lu Ze's body was granite. The hardness of granite is very high, and the hardness of massage has reached 7, which is harder than steel.

But that doesn't mean invulnerability.

If it comes into contact with something harder, it will also shatter.

According to Shikazawa, the principle of stone skin surgery is to absorb the earthy substances around you and cover them on your body surface to achieve the effect of enhancing your own hardness.

But the question arises: what is earth-bound matter?

The ancients divided the world into five basic elements: metal, wood, water, fire, and earth, and believed that everything in the world was composed of these five substances.

But Xu Wenshan knew that there were at least 118 elements on the periodic table. When he was in junior high school, he also memorized, hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon.

And these elements also have compounds, which together make up a colorful world.

The handful of sand that Lu Ze grabbed just now was mostly silicon and silicon compounds, and the composition of that handful of soil and sand was different. The soil also contains iron, aluminum, calcium, and even some organic matter and water.

The two are fundamentally different substances, but in the world of earth-walking monsters, these are earth-natured.

Therefore, Xu Wenshan analyzed that what the earth monster can control is not "soil" or "stone", but many inorganic compounds, such as silicon and silicon compounds. Laterite contains more aluminum, and he guessed that the reason why Luze said that laterite is not easy to control is because the alumina contained in laterite is not an earthy substance.

Therefore, the earth line, which ones are referred to, needs to be constantly searched.

What Xu Wenshan cares about most is "carbon" and its compounds, whether it is considered "earth-based substances".

Carbon is a living element that makes up all the organic matter in the world. There is carbon in wood, and there is carbon in the human body. If carbon or some compounds of carbon are also considered "earth-borne substances", the significance to Xu Wenshan will be huge.

If you can condense some substances with particularly high hardness with stone skin, then the effect will definitely be much higher than that of sand.

Xu Wenshan took Lu Ze and searched in the mountains for two whole days, and gained a lot.

He found quite a few ores: tin ore, brass, chalcocite, malachite, some diorite, hematite and, most importantly, some diamonds.

After trying, he found that metal ores such as tin and copper could not be controlled, but silicon-containing rocks could be controlled very smoothly.

The most important thing is whether the diamond can be controlled.

Xu Wenshan picked up this piece of diamond and carefully tested it with stone skin techniques, and soon, the diamond changed.

Lu Ze, who was on the side, widened her eyes, she had never seen what was happening in front of her.

Diamond is an atomic crystal made up of four carbon atoms, and a single diamond is a giant molecule, so it is very difficult to reconstruct with stone skin.

The atomic structure of diamond is a regular triangular pyramid, the structure is stable, and it is hard to dissociate, so Shikazawa never considered it to be an earth-based substance.

But now it seems that it is, just chemically more stubborn.

The diamonds are dissociated, they are divided into countless fine particles, and the original impurities in the diamond slowly precipitate out and fall off, and the remaining diamonds become transparent colors.

Although the diamond is hard, it is relatively brittle, and if it is directly covered in the fist to attack, I am afraid that it will be broken by itself. So he gathered these diamonds to form four cone-shaped sharp protrusions, and added relatively soft sand to this "fist gauntlet", which was padded under the diamond protrusions to ease the impact of the diamonds. He had never studied structure, and it was already his limit to be like this.

Then, an angular fist that refracted the light appeared.

Xu Wenshan raised this fist and said, "If I use this fist now, I can break through your defense." ”

Lu Ze looked at Xu Wenshan's shiny fist curiously, his eyes showed curiosity, but he didn't think that his beautiful fist could really break the defense.

Although the Stone Skin Technique is an introductory spell in the Body Forging Period, he is a monster in the Yin Refining Period, and his strength is comparable to that of a Foundation Building Stage monk.

The gap of a large realm is enough to shatter all illusions.

What's more, the Stone Skin Technique was the most proficient spell she had cultivated, and she was very clear about the advantages and disadvantages of this technique.

While it is true that Stone Skin can be used to cover fists and increase attack to some extent, this is not a strong point.

Stone Skin's strength is defense, not offense.

Moreover, the shiny earthy substance in Xu Wenshan's hand did not look very strong, but looked very fragile.

She estimated that the moment Xu Wenshan touched her stone armor, that fist would shatter.

So she was still a little worried about Xu Wenshan's self-esteem, and groaned for a while.

Xu Wenshan tilted his head and said, "What?" Scared? ”

Shikazawa pursed her lips, this was her way of expressing her displeasure.

She also tilted her head and said, "Then come on." ”

As soon as the words came out, Xu Wenshan moved.

The demonic power was full again, and he swung that beautiful fist and hit Lu Ze.

It's a beautiful fist, but it's not a fist.

The moment this fist touched the stone armor, the angular diamond armor on the fist joint quickly broke through the granite, creating an effect similar to plowing.

The protective effect of granite armor mainly comes from the hard surface structure, and diamond can easily break through this structure, and then rely on the impact of the fist to easily break the stone armor.

Diamonds are indeed fragile, but since he can reconstruct them, he can naturally restore the broken diamonds, so he doesn't have to worry about wasting them.

Lu Ze's expression changed drastically, she didn't expect this punch to be so powerful, she already felt that this punch broke through her defenses, if her body directly took this blow, the damage might not be light.

However, Xu Wenshan did not continue, and at the last moment he withdrew his fist, leaving only a shocking crack in the stone armor.

However, the effect of this punch is obvious to all: the stone armor that Lu Ze is proud of has been completely broken.

"What is this?" Lu Ze asked in surprise.

Xu Wenshan himself was surprised by the power of this punch, looked at his shining fist, and a sense of middle and second came spontaneously: "This is...... Diamond Stardust Fist! ”