The spiritual fire used for alchemy, similar to cooking, also has the strength and weakness of the fire, each heat corresponds to different materials, and the cooking is generally divided into simmering, medium, and martial fire, and the fire of alchemy is called slow fire, rapid fire and fierce fire.

The so-called three-fire purification method is aimed at an alchemy material, using the interspersed changes of different heat conditions to achieve the removal of impurities and refining the purity of the technique, which belongs to a very technical category in alchemy, and usually only senior alchemists can use it proficiently.

Seeing Fu Yun's skillful operation, and his expression was flat, as if using the Three Flames Purification Method was as simple as eating and drinking, Chen Xixi couldn't help but secretly admire.

The gap between himself and him in alchemy talent is too big!

I saw that as the layers of bubbles emerged, a layer of gray-white impurities gradually appeared on the surface of the gray-brown liquid mass.

Fu Yun controlled the liquid mass to rotate gently, allowing the impurities to naturally drip to the bottom of the Dan furnace and be swallowed up by the spiritual fire.

After cleaning up the impurities, Fu Yun then put in other materials and repeated the purification steps.

The liquid mass in the center of the alchemy furnace gradually grew larger as the materials were added in stages, and soon turned into a blue-blue color the size of a ping-pong ball.

Fu Yun immediately turned up the firepower of the spiritual fire to the maximum, and wisps of green smoke rose from its surface as the cyan liquid slowly rolled and turned.

As the cyan flames continued to scorch, the cyan liquid gradually shrank at a visible rate, and soon shrank to the size of a finger.

Seeing that the elixir was almost calcined, Fu Yun immediately injected a spiritual energy into the alchemy furnace, carefully wrapped it, and the spiritual fire under it gradually turned off, allowing the elixir to gradually cool and form.

As the smoke from the roasting in the furnace slowly emanated from the exhaust groove above, a prototype of the elixir with a pitted surface gradually appeared.

Seeing this elixir that had roughly taken shape, Chen Xixi was secretly surprised.

Fu Yun's refining speed is also too fast, not like the first refining at all, but like a veteran who has been tempered for thousands of years.

Fu Yun didn't know what she was thinking, and completed the final process of refining the spirit tonic pill by herself.

Slowly injecting the spiritual energy into the alchemy furnace again, repairing the unevenness on the surface of the spiritual elixir, and at the same time infusing the pure energy in the spiritual energy.

For a long time, when the flame under the alchemy furnace was completely extinguished, the elixir in the furnace had been repaired to be as warm and smooth as a pearl, and the faint blue luster lingered on the surface of the elixir like silk threads, setting it off beautifully.

Looking at this freshly baked tonic elixir, the brilliance on the surface, Chen Xixi couldn't help but look stupid.

Fu Yun hurriedly took the jade bottle on the side, put the elixir in it, and plugged the cork.

Only then did he breathe a sigh of relief and wipe the sweat drops from his forehead.

With the help of the system, his refining technique is perfect, but manipulating the aura to adjust the alchemy is real and unstoppable, and it is still a little reluctant for the level that is still in the qi refining stage.

Although the tonifying elixir is nominally divided into first-grade elixirs, due to its special effect, the difficulty of refining is even higher than that of some second-grade elixirs.

Therefore, in the eyes of many people, if the success rate of refining the tonic elixir is greater than fifty percent, they have the qualification to impact the second-grade alchemist.

Chen Xixi took the jade bottle, pulled out the cork and looked at it, and raised her eyebrows slightly.

"Judging from the appearance of the elixir, it should be flawless!"

Seeing that Fu Yun's face was indifferent, and there seemed to be no excitement at all, she couldn't help but be stunned.

"Husband, you don't seem surprised at all?"

Fu Yun was stunned for a moment, and immediately thought that his expression was too calm, so he quickly opened his mouth wide, pretending to be surprised.

"What? Flawless? Looks like luck is really good!"

Chen Xixi flattened her mouth and said aggrievedly: "Husband, do you treat me as a child, so easy to deceive?"

Fu Yun couldn't help but smile, and suddenly pulled her into his arms and kissed her under the clean and tender cheek.

Chen Xixi suddenly blushed and struggled: "Husband...... Don't do this...... It's a public place......"

Fu Yun smiled evilly: "What are you afraid of! Anyway, the door has been locked." ”

Chen Xixi struggled twice but couldn't break free, so he could only collapse in his arms, not daring to move.

Fu Yun secretly shouted that it was dangerous, but fortunately he was witty and confused.

But it doesn't seem to be a long-term solution.

I want to refine the elixir in batches this month, and in order to earn more spirit stones, I must ensure the high quality of the elixir.

Like the spirit pill that was refined just now, the purchase price of the ordinary level was twelve spirit stones, but if the quality was higher, the purchase price would also rise.

If it is refined to a fine grade, the purchase price will rise by one percent, that is, thirteen spirit stones.

If it is an excellent level, it will float by thirty percent, that is, fifteen spirit stones, and if it is at the flawless level, it will be raised by fifty percent, that is, nineteen spirit stones, and if it reaches the highest perfection level, it will be doubled, that is, twenty-four spirit stones.

In other words, refining a perfect-level elixir is equivalent to earning an extra spirit stone.

However, there were some details that Fu Yun still missed, and he didn't find out until he personally refined a tonic elixir.

In addition to the cost of the elixir itself and the rent of the alchemy room, the cost of alchemy must also include the consumption of spiritual energy during alchemy.

After an operation like he had just done, nearly half of the spiritual energy in his body had been consumed.

And with his current cultivation, one tonifying elixir can almost replenish all of his aura, that is to say, the aura he consumes needs to take half a tonifying elixir to recover.

Of course, you can also choose to recover naturally by resting, but this is too slow and will waste a lot of time, and Fu Yun obviously won't think about it.

And refining a tonic elixir requires most of the incense, that is, about a little more than ten minutes, and it is a spirit stone converted according to the rent of a small alchemy room.

In this way, refining a tonic elixir requires a total of eleven spirit stones.

After this calculation, Fu Yun suddenly felt a little toothache.

No wonder the alchemist is so expensive compared to other professions, it's all money, oh no, it's smashed out of spirit stones!

Imagine an ordinary first-grade alchemist, if calculated according to the average probability, the success rate of refining this tonic elixir is about thirty percent, so for each successful refining one, the cost that needs to be paid is seven spirit stones on average.

According to the ordinary speed of refining three pieces per hour, after ten hours a day, more than two hundred spirit stones were smashed into the water.

And how many days of practice can be proficient in the refining skills of this elixir, it is even more different from person to person.

And this is just one of thousands of elixirs, and it is still a very rudimentary kind.

Fu Yun's heart was suddenly filled with deep admiration for the profession of alchemy.