"Drink!"

With Liu Yu's roar, her magic power was concentrated in one place, and a strong wind blew around her in an instant, and Liu Yu almost controlled this wind perfectly, without a trace of leakage, and the air poured into the furnace.

The flames burst into flames. The flame, which was still orange-red just now, turned golden orange in an instant, and after Liu Yu's magic flow stabilized, the flame completely turned golden yellow.

"Golden flames! The temperature inside the furnace has reached at least 1,300 degrees Celsius! ”

The village chief on the side couldn't help but have excitement on his face, but he soon found that just the golden flame was still not enough to melt the material that Han Kun had given!

"How could it be ......"

Liu Yu also noticed the cyan material in the furnace that resembled a steel wool ball, and even this temperature was not enough for it to melt.

"Can't even Miss Liu Yu do it...... That's it, the old man should find another way. ”

"No!"

Liu Yu's roar stopped the village chief.

Why? Why does this iron lump just not melt?

A stubbornness in his bones makes Liu Yu not easily admit defeat. He mobilized the magic power he could control to the extreme, but it only made the golden flame shine three more points.

"Stop it, Miss Liu Yu, it seems that the melting point of this metal is no longer something you can reach."

"I don't believe it! It's just a steel wool ball, why can't it melt? ”

The speed of mana output was increased again, but Liu Yu still couldn't see the slightest sign of melting.

"If you want to increase the temperature of the flame, you can't just increase the blast speed."

A crisp female voice sounded in Liu Yu's ears, and it was Ke Zhenya who came.

"Eh, why are you here?"

"There's been such a big commotion, why shouldn't I come? Concentrate on controlling the magic first. ”

"Hmm."

Seeing this, Liu Yu slowly stopped releasing her magic power, and in just a few minutes, her magic power was consumed by fifty percent.

"Why don't you ask me about fire?"

Ke Luya just spread his hands, and a small fire lotus appeared in the palm of his hand.

Liu Yu suddenly realized at this moment that Ke Yanya's fire lotus had helped them a lot along the way, and he had actually forgotten about it at such a juncture.

"Increasing air circulation does make the flame burn more vigorously, and that's a good idea, but you don't realize why it heats up the flame."

Ke Qiya focused his attention on the fire lotus slightly, and with just a little control, the black-purple fire lotus immediately changed from black-purple to purple-red, and just by looking at it, he could feel the temperature of the fire lotus change drastically.

"Air promotes the burning of flames...... Is it because there's oxygen in the air? ”

"Yes, oxygen is the most commonly used accelerant in nature."

"Huh? Is oxygen an accelerant? ”

It seems that the two methods described by the village chief have finally converged in one place.

"yes, so, as long as you can extract the oxygen from the air and heat up the flame, that's pretty straightforward."

Ke Luya smiled, extracting oxygen from the air, which was not something that could be done with words.

"I ...... Try it. ”

Liu Yu slowly closed her eyes. She focused all her attention on perceiving the air around her.

There is still a little magic that spills into the air, and if you want to extract oxygen from the air, you must first feel the presence of the air, which seems simple but is not so easy to do. But fortunately, with Liu Yu's magic power affinity for air, this can be done easily.

The next challenge is to separate the oxygen from the air. In terms of composition, the highest content in the air is undoubtedly nitrogen, followed by oxygen. The ratio of these two major gases is approximately equal to four to one. Nitrogen is a very stable gas, while oxygen is much more reactive. Liu Yu still knows these common sense/

Is it possible to separate oxygen and nitrogen by taking advantage of their different levels of activity?

An inspiration flashed through Liu Yu's mind. Yes, in the process of controlling the air, there are differences in the air with different levels of liveliness. For example, if you are in a forest, the air is more lively and relatively difficult to control, and when you are underground, the air is less lively and relatively easier to control. As long as you use magic to separate the gas that causes the air to become lively, it is oxygen!

Keria smiled knowingly, she could feel the composition of the air around her, which seemed to be slowly changing.

Although the extraction process was extremely laborious, Liu Yu still did it in the direction she wanted. As the concentration of oxygen increases, this gas becomes more and more difficult to control, and if it weren't for Karina's training, it is estimated that Liu Yu would not have been able to do this kind of thing at all.

Ke Luoya could clearly feel that the concentration of oxygen in the surroundings had increased. An increase in the amount of oxygen will make people feel happy and more relaxed, but the oxygen that Liu Yu can extract cannot reach a certain purity. However, it is quite gratifying that Ke Luoya can understand this level with just a little hint.

"I'll do the rest. This metal, if memory serves, needs to have a melting point of almost 3,000 degrees Celsius. ”

Krya muttered, though only she could hear her words. She held out a hand, palm aimed at the furnace.

"Up!"

Blazing!

The flames in the furnace rushed in an instant, orange-red, orange-yellow, golden-yellow, incandescent!

This posture instantly shocked everyone around them, and the flames in the furnace were already glowing incandescent!

"It's not enough! Give me a liter! ”

Ke Qiya's magic power fluctuated again, and the flames in the furnace actually turned blue and white!

The huge magic power fluctuation disturbed Liu Yu, who was closing his eyes and thinking. She looked in amazement at the furnace, the piece of metal that she couldn't figure out with any effort just now had obediently melted into a puddle of liquid.

The fluctuations in her mana slowly faded, and it took less than two minutes for her to completely turn the metal into a liquid.

The village chief was stunned at first, and then let out a loud shout: "What are you doing in a daze!" Let's get to the next step! ”

For a while, the pile of shirtless men were all busy.

"It's amazing......"

"My talent for controlling flames can only be described as average, if it were you, as long as you succeeded in separating the components in the air, I believe you would be able to achieve this level."

Ke Luya patted Liu Yu on the shoulder and gave her a smile.

"Hmmm! I'll try! ”

......

At night, Han Kun lay in the tent, but he couldn't sleep.

"Dong Dafeng, that guy, the snoring can still be heard from two tents."

Han Kun sighed helplessly, he couldn't rush up and wake people up, right?

Suddenly, the tent's zipper was unzipped.

"Wow!"

"Shhhh I'm Wu Yan, be quiet! ”

Wu Yan lowered his voice and said to Han Kun.

"Why did you come to me in the middle of the night?"

"Can you sleep? Ohmine, that guy started again. ”

Han Kun also looked a little helpless, and he could see that Dong Dafeng's snoring was not a matter of a day or two.

"Let's get dressed first, I have some things I want to discuss with you."

After speaking, Wu Yan turned his head and stood aside waiting for Han Kun.

It could be seen that he had something to say to Han Kun at such a time, and Han Kun quickly got dressed and walked out of the tent.

"Let's find a quieter place a little. Sorry, I don't want them to hear about this. ”

Han Kun just nodded knowingly and didn't say anything.

In this way, the two left the camp one after the other, and it seemed that Wu Yan intended to take him away from here, but after walking for more than ten minutes, Wu Yan still did not stop. In any case, the two of them have traveled too far.

A dark shadow swept through the trees, her movements too dexterous to make a sound, and Jia'er was weaving between the branches, following the two of them closely. It was difficult to find her whereabouts during the day, let alone now that there was a cover of night.

Talk? It's a bit too far. Could it be that he has anything to do with the Fordans? It might be a good idea to take me hostage. No, his footsteps can see that he is in an unstable mood, but it is not caused by a weak heart.

Along the way, although the two didn't talk a word more, Han Kun used his keen eyes to carefully observe a large number of details of Wu Yan, and gained a lot of information from these details.

"Here we are."

Wu Yan finally stopped, and the two of them actually came to the small river during the day.

"Ah, so what did you call me over? But no matter what, if you just don't want them to know, there's no need to go so far, right? ”

Unconsciously, Han Kun had already distanced himself from Wu Yan.

"I said Han Kun, do you know why this world has become the way it is?"

"Why are you asking this, that's not why you called me out."

"Don't be nervous, I'm not hostile. I'm just a little curious about it. ”

Han Kun didn't make any answer, just stared at Wu Yan's face with his eyes, and that cold gaze seemed to be able to pierce Wu Yan's body.

"How can you say it, Han Kun, you are all human beings who have lived from the incident to the present, you must know more about this matter than us, alien invasion or something."

Indeed, Han Kun can be said to know more than anyone else, but not everyone can tell these things.

"Don't you think it's ridiculous? The civilization that humanity has spent so many years building is not bullshit in front of these aliens, and in front of these invaders, humans are just ants. ”

"So, what are you trying to express?"

"I'm a little tired, really. There's no point in us hiding here, at most we can survive for a few days. At the end of the day, we're going to die. ”

"That's why you're giving up on yourself?"

Wu Yan's expression was close to distortion at this moment, as if he was making some kind of painful choice.