Back in the room, Lu Tianyu, who had eaten a trench and grown wise, did not ask Yao Xin to refine the medicine immediately, and after closing the doors and windows, he lazily rolled into bed and slowly fell asleep.

After the night fell and everything fell asleep, Lu Tianyu, who was lying on the bed, opened his eyes violently, jumped off the bed vigorously, took out the medicinal materials hidden in the cabinet, carefully placed them on the table, and then looked back at the medicine heart that was suspended one foot from the ground like a ghost, and asked softly: "Master, is it okay at this time?"

"You have finally learned to be careful, alchemy requires a very quiet environment, if the consequences of being disturbed are very serious, I will not suffer any backlash now, but in the future, when you learn alchemy, if you are still so careless, I am afraid that it will be a matter of time before I lose my life, and then I can only send white-haired people to black-haired people." Yao Xin walked to the table, his illusory palm lightly touched the various materials, nodded slightly, and his faint tone was slightly stern.

Tilting his head a little embarrassed, Lu Tianyu nodded instructively.

Looking at Lu Tianyu's obedient appearance, Yao Xin breathed a sigh of relief, his palm spread out, slightly silent, and the white flame slowly rose.

The soul perception constantly controlled the temperature of the flame, and Yao Xin took advantage of this free time to glance at Lu Tianyu, who was looking at the flame in his palm with a curious face, and after a little hesitation, he said softly: "An alchemist, he can generally tell his grade from the color of the flame. ”

"For ordinary alchemists, the flames are all pale yellow, and the higher the grade, the darker the color and the stronger the power. ”

Hearing this, Lu Tianyu blinked, pointed his finger at the flame in Yaoxin's hand, and asked in amazement, "Then master's, how can it be white?"

"What I said earlier is the common flame among alchemists, but in the circle of alchemists, in addition to relying on the strength of the fighting qi to catalyze the flame, there is another..."Yao Xin smiled slightly, and there was a slight pride in his smile.

"That is, borrow fire!"

"Borrow fire?" is not an unfamiliar word, but the meaning it contains makes Lu Tianyu's face full of confusion, the fire of refining medicine can also be borrowed?

"That's right, it's by fire. Nodding heavily, Yao Xin smiled: "In this vast world, there are some heaven and earth fires, maybe they are the clusters of flames carried by the center of the meteorite falling from the sky, or maybe they are the lava and earth fires that have been forged for thousands of years in the depths of the volcano, these strange fires are a little more powerful than the flames catalyzed by the strange gas, and refining the medicine can also improve the medicinal power of the pill, however, these heaven and earth fires are extremely violent, and it is rare to meet each other on weekdays, and even if they do, it is extremely difficult to take them for their own use." ”

"Many alchemists have been looking for a lifetime of different fires, but in the end they have never been able to get what they want, after all, if you want to control the different fires, you need to introduce the flames into your body, and the different fires are all violent and destructive, even the most solid metal materials, can not withstand the calcination of the different fires, not to mention the fragile flesh of people, such a method is undoubtedly setting fire to the body, so only a very small number of lucky people, by chance, can refine a small cluster of different fires and cultivate them into their own fire, and these people, without exception, are the leaders in the alchemy world。 ”

Listening to it was a little dizzy, after a while, Lu Tianyu licked his lips, his eyes stared at the white flame in Yao Xin's hand, and when he felt it carefully, he seemed to have a cold illusion.

"Then this flame of the master must also be a strange fire, right?" Lu Tianyu asked tentatively.

"What do you say?" Speaking of his own flame, the old face of Yao Xin shone slightly, and his eyes were blazing: "The alchemy world of the Purple Continent has compiled a "Strange Fire List" from the well-known different fires, of which there are twenty-three in total, and my fire is the eleventh-ranked "Ghost Spirit Fire", this kind of strange fire can only be encountered in the land of extreme cold and extreme yin every hundred years, when the sun and the moon alternate. ”

"Turtle Spirit Fire?" Lu Tianyu muttered softly as he looked at the churning white flame without blinking.

"In order to successfully obtain this "Turtle Spirit Fire", I stayed in that dark ghost place for eight years, and at the moment of final absorption, I was so well prepared that I was almost burned to ashes by this ghost thing. Yao Xin shook his head with a sigh, and his calm old face showed a rare hint of fear, it seems that that encounter really made him remember it deeply!

"Hehe, although the danger is extremely high, as long as you can get this "ghost fire", everything is worth it. Yao Xin proudly raised the white flame in his palm, and said with a smile: "As long as you have a different fire, not only will the medicinal power of the elixir refined be stronger, but when you are against someone, a strong person of the same level will not dare to touch it at all." ”

Hearing this, Lu Tianyu looked at the churning white flames, his face full of envy.

Looking at Lu Tianyu's envious appearance, Yao Xin smiled, a sly smile flashed on his face, but his voice suddenly changed: "The alien fire is still quite far away for you, and now your biggest expectation is to pray that you will become an alien as soon as possible!"

Nodding with some regret, Lu Tianyu had to temporarily withdraw his coveting of the alien fire and pull his mind to reality.

Seeing that Lu Tianyu came back to his senses, Yao Xin smiled slightly, the white flames in his palm kept surging, clusters of flames rose into the air, and immediately dissipated, and his dry palm grabbed a brittle liquid lotus, and then gently threw it into the flames.

As soon as the brittle liquid lotus was contaminated with the turtle spirit fire, it was calcined into a brittle blue liquid in an instant, and the liquid slowly rolled in the flames, reflecting a faint luster.

The white flames were churning more and more intensely, but Lu Tianyu on the side found strangely that the air outside the white flames seemed to be getting colder and colder.

The medicine heart was preoccupied with controlling the temperature of the flame in the palm of his hand, and at this moment, as long as the temperature was slightly higher, this brittle blue liquid would be calcined into a cloud of void air.

After the temperature of the flame was maintained to a certain limit, a little yellow impurity suddenly appeared in the brittle blue liquid.

Looking at the yellow impurities that appeared in the liquid, Yao Xin nodded slightly, and with a flick of his fingers, a small cloud of crisp blue liquid wrapped in yellow impurities was expelled from the main body by him.

After expelling this mass of yellow impurities, some small pale yellow impurities appeared one after another, and these impurities, all of which were cleaned up by the medicine heart without exception, in the continuous calcination of the white flame, the brittle blue liquid with a small half a fist has shrunk to the size of a thumb, and the deep brittle blue liquid slowly tumbled in the white flame, like a sapphire, deep and mysterious.

After calcining the first Crispy Liquid Lotus to the size of a thumb, the Medicine Heart stopped calcining and threw the other four into it again, refining them all into four sapphire-like pure liquids.

After a long period of calcination by the Turtle Spirit Fire, the five small liquids gradually fused, and after the fusion, the volume expanded a lot, but this phenomenon only lasted for a moment, and then shrank to the original size again.

The flames rolled for a long time, and even in the blue liquid, it seemed that a cluster of white flames could be seen beating, seeing this scene, Yao Xin's palm quickly grabbed the demonic flower on the table, and then threw it into the flames.

As soon as the demonic flower entered the flames, it turned into a black liquid with a trace of cold air, and the impurities in this black liquid were quickly removed, and the medicine heart slowly covered it with a black liquid that was burning all over its body.

"Squeak..."

When two liquids with different properties touched, there was a sudden burst of strange sounds, and a faint white gas rose from the flames. The white qi gradually weakened, and a prototype of an elixir with a rough surface quietly appeared in the flames.