Although the blood-burning secret technique of "Copper Puppet Gong" can be used to refine copper, in the process of copper refining, there must be copper elements that have not been absorbed by the heart of copper refining. For example, when the copper element reaches the boiling point, there will inevitably be a part of the copper element vaporized, and this part of the copper element is not absorbed by the heart of copper refining, so it falls into the human body, and over time it will naturally become metal poisoning.

However, this disadvantage is not a big problem for Li Xiao, he has an immortal body, and even if he is poisoned by metal, he can excrete the harmful part from the body through metabolism.

No matter how you look at it, this exercise seems to be tailor-made for him.

"Zhang Long, you go to the treasury to find the account room, and say that I need a lot of copper here, no matter what method he uses, I will see the copper I want tomorrow, the more the better. ”

Li Xiao decided to practice "Copper Puppet Gong" first, but the name "Copper Puppet Gong" is a bit unworthy of the name, although its original intention is to refine copper blocks into puppets, but Li Xiao feels that it is more appropriate to call it "Copper Alchemy".

Anyway, now the original is dead.

Li Xiao simply changed the name of this exercise to "Alchemy of Copper", anyway, zombies and ghosts can't practice this exercise, and living people who practice this exercise will also die of metal poisoning, only he can practice this exercise, and the naming right naturally belongs to him.

When Zhang Long was ordered to leave, he ordered the ghost tiger to close the door and return to the bed to start cultivating.

The first step of "Alchemy of Copper" is to refine the copper element in the body, and first form the heart of copper refining.

In fact, this copper heart is equivalent to the core, and part of the copper refined later is used to strengthen the copper heart of copper smelting, and some parts are controlled as puppets.

"Blood-burning secret technique, up!"

Li Xiao sat on the bed with his eyes closed, first sensing the flow of qi and blood in his body, and then stimulating the blood by absorbing evil qi, this step is easy for ordinary people, but it is very difficult for him, because once the evil qi enters the body, it will be absorbed by the lower body in the blink of an eye.

It took him four hours to complete the first step of the Blood Burning Secret Technique, on and off.

Under the stimulation of evil qi, the temperature of the blood in the heart rises slightly, and then it is easy to sense the copper element in the body.

Of course, this is because Li Xiao's innate spiritual power is far beyond that of ordinary people, and ordinary people may be able to complete the first step quickly in such a large-scale corpse raising ground, but they will be 100% stuck in the second step, and they will not be able to sense any copper element at all.

But Li Xiao was just the opposite, the first step was extremely difficult, but the second step came naturally, and in the blink of an eye, many copper elements were gathered in the heart.

The next step is the water mill, constantly absorbing the evil qi to stimulate the blood, and refining the copper element that has gathered little by little.

After all, it is in the heart of copper refining, the degree of danger is extremely high, it is impossible to refine all the copper elements in an instant, if you are really in a hurry for quick success, it is estimated that the heart will be refined before you start smelting copper.

Li Xiao's practice is one night.

The next morning he opened his mouth and exhaled a puff of white smoke, which fell to the ground and turned into a little brass, which was very small, smaller than the tip of a ballpoint pen.

When he opened his eyes to look at the brass, the brass was affected by his thoughts, jumped up and down on the ground, and finally flew back to the palm of his hand on its own, not following his wishes.

"The control is too weak. ”

Li Xiao sighed, and then ordered the ghost tiger to open the door to see if the copper he asked for had been delivered.

Facts have proved that the most important place for cultivators is wealth, and wealth is indeed in the first place.

Li Xiao had his back to the palace, and he didn't need to wait a day for cultivation resources at all, and when the ghost tiger opened the bedroom door, Li Xiao saw a large number of copper blocks piled up into a small mountain, which was enough for him to practice "Alchemy of Copper" to the fullest, and even redundant.

There was enough copper, and Li Xiao immediately ordered the ghost tiger to move the copper into the room, while he sat on a chair and began the great cause of copper smelting.

In the next half a year, Li Xiao closed his door and devoted himself to the great cause of copper smelting.

Although King Li Zhuang and the Eighth Lady occasionally came to see him and delayed his great copper smelting business, the overall process was relatively smooth, and there were no more accidents such as assassins.

"I have completely mastered the principle of copper alchemy in the past six months, but why does copper alchemy only smelt copper? Obviously, the melting point of gold is lower than that of copper. ”

Li Xiao is not completely brainless while refining copper, he will also have his own ideas.

For example, "Alchemy" was expanded to become alchemy, iron, silver, steel, and aluminum......

So, Li Xiao began to conduct experiments on his own, first of all, alchemy.

The melting point of gold is indeed a little lower than that of copper, since copper can be smelted, it can naturally be alchemized, but as the amount of gold he refines increases, he finds a problem, gold is heavier than copper, and when the quantity is small, there is not much difference in control, but when the amount of gold continues to increase, the disadvantages begin to appear.

Gold is far less easy to handle than copper, with more and harder copper at the same weight, and gold is less abundant and softer.

In fact, there is another point, that is, cost performance.

The material needed for alchemy is only copper, and the material needed for alchemy is gold, if Li Xiao was not born in the palace, how could there be so much gold to squander.

So alchemy is inferior to alchemy in all respects.

After Li Xiao determined that the gold was not suitable, he kept only a small amount of gold that had been refined, and the remaining gold was returned to the treasury.

Next, he wants to come to the iron block and try his hand at iron smelting.

Iron is cheaper than copper in this world, and it can even be advanced to steelmaking, which is far more cost-effective than copper smelting.

However, he soon realized why the original creator did not use iron, because iron has a higher melting point than copper, and it is much higher.

In the same time, copper smelting is much faster than iron smelting.

Li Xiao wasted the strength of nine bulls and two tigers, and finally refined a piece of iron, and in the end, even he couldn't stand this efficiency, it was completely half the effort.

As for the remaining materials, there are similarities.

However, the problem of silver was not particularly big, so Li Xiao refined a lot of silver, and as for the remaining materials, he also refined a part, and finally shifted his focus back to copper smelting.

After some experiments, he had to admit that copper was the most suitable material, and copper smelting was the most suitable road.

In the middle of the night, when he was persistently smelting copper, in a small building hundreds of meters away from the palace, two ghosts came out of the ground and quietly gathered together.

"Thousands of mountains and rivers are just to win the heart of the king!"

"The sea is dry and the rocks are rotten, and they will also take the king's life!"

As soon as the two ghosts met, they immediately spoke to each other.

After making sure that each other's code words were correct, the two ghosts let their guard down.

"Nightmare, open!"

One of the ghosts whispered, and the internal space of the small building was suddenly separated from the external space.

"Bai Jue, who is the target this time, and you want us to attack both black and white at the same time?" The other ghost spirit saw that the nightmare realm had opened, and only then did he return to his normal tone when he spoke.

One of them is called Bai Jue, and the other is called Black Jue, together they are black and white, and they are the most famous killer combination in the zombie dynasty killer world, once they are targeted by the two of them, as long as the target is not the zombie king, they will definitely die.

Dressed in a white robe and wearing a Shura mask on his face, Bai Jue spoke: "This time, the target is Li Xiao, the youngest son of King Li Zhuang!"

"Li Xiao, this little broken child who has not dried up should only ...... Seven...... Eight years old, right?Who is so ruthless?" Hei Jue, dressed in a black robe and wearing a Rakshasa mask on his face, wondered after hearing this.

Bai Jue replied: "The identity of the employer is unknown, but it is actually very easy to guess, it is nothing more than that the ghost king of Donghe Mansion wants to break the seven feelings of King Li Zhuang, there are rumors that King Li Zhuang prefers his youngest son, if Li Xiao is dead, and it is the death method of soul scattering and body shattering, do you think King Li Zhuang will be angry?"

"Could that ghost king be nearby, once King Li Zhuang is furious, he will brazenly take action and use the Seven Emotions Horror Divine Technique to detonate King Li Zhuang's anger?"

Bai Jue smiled: "Then it's none of our business, we have only one task, that is, to kill Li Xiao, and it has nothing to do with me in the future." ”

"It looks like the zombie dynasty is about to change again. Hei Jue sighed with emotion, and then motioned to Bai Jue to unravel the nightmare realm.

When Bai Jue lifted the Nightmare Realm, Hei Jue squatted on the ground, pressed his right hand to the ground, and said in a low voice: "Shadow Dao, open!"

At this time, it was the middle of the night, so after the black absolute used his natural supernatural powers, there were no waves at all, but unlike the previous drilling, the ground was already covered by an invisible black shadow.

Hei Jue sank into the shadows and said, "Go!"

The two of them sneaked into the shadow path and quickly approached the Zombie King's Mansion, without being surprised by anyone along the way.

In fact, the reason why black and white are able to assassinate targets 100% every time they cooperate is precisely because the natural abilities of the two are extremely suitable for assassination.

Bai Jue's talent is called the Nightmare Realm, and once it is opened, it will isolate everything, and anything that happens in the Nightmare Realm will not be known to the outside world.

The Black Shadow Path can turn the shadow into a passage, and as long as the shadows are connected, he can reach them unimpeded and will not be discovered by anyone.

The combination of the two talents becomes an assassination skill, which can sneak into any place and silently assassinate the target.

After sneaking into the Zombie Palace, it didn't take too long to find Li Xiao's room, Zhang Long and Zhao Hu stood outside the door of Li Xiao's room like a door god, completely unaware of the shadows on the ground and two ghosts passing by.

In the room, Li Xiao was still refining copper, and the ghost tiger was sleeping next to Li Xiao.

"Nightmare, open!"

Suddenly, the atmosphere of the entire room changed, and Black Jue and Bai Jue appeared in the room, and killed Li Xiao as fast as they could.

The zombie defense is invincible, the speed of the ghost is unparalleled, Li Xiao didn't react at all, the black and white double absolute had already killed in front of him, the ghost tiger reacted very quickly, and immediately roared into the form of a big tiger, and when it didn't have time to protect it, it was entangled by a large number of black shadows, which was the shadow path of the black absolute hidden silk.

Bai Jue slapped his palm on Li Xiao's forehead, and Li Xiao was suddenly slapped on the wall, and blood spurted out of his facial features.

"The target is dead, let's go!" Hei Jue saw that Bai Jue had succeeded, and immediately spoke.

Bai Jue felt that something was wrong, and refused: "No, he didn't die, it may be that King Li Zhuang gave him a magic weapon for self-defense, quickly mend the knife!"

However, at this time, the ghost tiger had already reacted, and the monstrous ghost fire burned the black silk wrapped around his body, blocking in front of Li Xiao, and let out a terrifying roar at Bai Jue and Hei Jue.