For Li Ling, retreat is already commonplace, and for an alchemist, retreat is like eating and sleeping, indispensable.

Li Ling completely closed himself in the room, and placed the alchemy furnace in the center of the bedroom, the alchemy furnace was already more than three feet tall at this moment after the last refining and upgrading, and the aura and fire spirit that it could hold were more than twice as strong as before.

"This time, we must make good use of the remaining medicinal materials, and we can't waste a single point, otherwise I'm so sorry for the medicinal materials that I have worked so hard to accumulate." Li Ling took out the medicinal materials from the space ring one by one.

"Agave, the last time I was in the canyon, I picked up the herb occasionally." Li Ling placed a bundle of agave medicinal herbs on the floor, but he sat cross-legged on the ground.

"Qihua grass, the last time I passed through the grassland, I found that it should be a neutral herb, which can be assisted." Li Ling carefully placed the flowers and plants in front of him, afraid of damage.

"Dragonbeard. There's still a little more than a foot left, and it's gone when it's used up, hey. Li Ling sighed slightly, cherishing the dragon beard.

"Vine flowers! The last time I picked it on the top of the peak, it belongs to the cold flower herb. Yes, when the positive pill is too strong, add some to neutralize the yang spirit. Li Ling took out three plants, these were enough.

"Agave, weeds, dragon's beard, vines. And the most important one, the dragon silk. The main ingredient in refining the Bone Pill. Li Ling took out the one-zhang long dragon silk and placed it in front of him.

Li Ling picked up the dragon silk, took out a dagger from the space magic weapon, and slashed it on the dragon silk. Sadly, the toughness of the dragon silk was extremely strong, and it was Li Ling who wrapped the dagger with the true qi of the body. It is also a weapon worthy of being a good product.

"Grandma's, this dragon silk is so tough, and the dagger can't be cut at all." Li Ling looked at the dragon silk in his hand in distress, but he couldn't cut it, if he couldn't cut it, would he have to refine all the dragon silk that was more than a zhang long?

Li Ling immediately shook his head. felt that his idea was too extravagant, but this dragon silk was bought for 800,000 ink crystals by himself, which can be described as bankrupt. How can it be so wasteful.

In desperation, Li Ling also had a headache for a while, and he didn't know how to cut off the dragon silk in Lu Dao, even if it was a small inch. Yes, too. It's a pity that not to mention a small inch, even a centimeter, Li Ling keeps cutting.

After trying everything he could, Li Ling decided to use the fire in the Dan furnace to refine the first half of this dragon silk, after all. The fire in the Dan furnace is not an ordinary fire. Rather, it is a spirit gathering fire, which is more powerful, more condensed, and more calorific than the fire spirit in the outside world.

Li Ling waved out his palm, sending the positive true qi into the furnace, and the flames in the Dan furnace were burning, Li Ling's own strength was more than one or two points stronger than before, and the fire in the furnace was also much stronger than before, which was also very surprising to Li Ling.

When the flame in the furnace gradually changed from normal flame red to cyan, Li Ling suddenly felt happy in his heart, could it be that this is the legendary green fire, which is more powerful than the red fire.

When Li Ling saw the green flame flickering in the Dan furnace, his confidence immediately increased, and he felt that this time, he would definitely be able to refine a better-grade elixir.

"Qinghuo, that's great, according to the records in the pharmacopoeia, as long as the flame reaches cyan, it means that there is a little more fire spiritual power than the lowest-level red fire, so when refining the elixir, it can increase the probability of refining a high-grade elixir." Li Ling was quite excited in his heart, which was an unexpected joy.

When the green fire was burning very strongly, Li Ling used his other hand to take a break of the dragon silk, and then slowly stretched it into the Dan furnace, the powerful flame, sure enough, has the power to refine the dragon silk, when the dragon silk entered the Dan furnace, it began to soften.

Li Ling knew that the dragon silk could only be placed in the Dan furnace for a while, and then it had to be taken out, because once it was placed for a long time, it was likely that the dragon silk that stretched out into the green fire would be directly vaporized.

After the dragon silk softened to a certain extent, Li Ling took out a break of the dragon silk, raised the knife in his hand, and the dagger cut off the dragon silk that had been softened, and the top of the dragon silk was cut off by Li Ling, and it just fell into the Danpan, and it was rising green smoke.

The tip of the inch of the dragon silk is still in a semi-liquid and semi-solid state at the moment, slowly turning into a small dot in the center of the Danpan, a bit like the shape of a Dan pill.

"All that's left is to start configuring auxiliary herbs." Li Ling picked out agave, agave is a positive herb, and its extremely strong masculinity often allows some pills to exert very significant medicinal power.

Li Ling took out the medicine dish, put a small handful of three agave into the medicine dish, slowly took the medicine pestle, and slowly grinded it in the medicine dish until the agave was completely squeezed into a juice state.

Looking at the green juice agave in the medicine dish, Li Ling dipped his finger in it, stretched out his tongue, and pointed it on the tip of his tongue, feeling a hot feeling.

"Uh......h It's such a hot agave, and it's really genuine. Li Ling said with emotion.

After trying the agave, Li Ling put the agave aside and picked up the next auxiliary medicinal herb, the neutral herb, which can play a certain neutralizing role.

Li Ling also threw it in a medicine dish, ground it with the juice of agave, and compared it with the pharmacopoeia, the dose was reconciled to achieve a certain balance.

The rest is the dragon beard, the dragon beard must be added, Li Ling took out a broken dragon beard, added it to it, three kinds of medicinal materials, mixed together, ground together, gradually melted into one, turned into a paste-like solid liquid.

Then, the solid liquid in the medicine dish was poured into the Dan plate, and the pill of the dragon silk that had just been condensed was poured together, and it became a bone pill.

Li Ling picked up the Dan Pan, sealed the Dan Pan, placed it in the center of the alchemy furnace, and increased the green fire in an appropriate amount, and suddenly, the medicinal herb turned into gas and flew continuously in the Dan Pan.

This is alchemy gasification, in the past, Li Ling used red fire, which could not reach the level of gasification at all, but at this moment, the power of the green fire and the fire spirit are twice that of the red fire, and it can already achieve the complete gasification of the pill in the pill in the pill plate, which can completely integrate the medicinal materials into one, which is more significant than the liquefaction effect.

As the temperature of the green fire gradually increased, the vaporized pill in the Dan plate gradually turned into a red mist, Li Ling knew that it was the positive attribute of the agave, which was gradually playing a role, but Li Ling also knew that once the red mist turned crimson, it was time to lower the temperature of the green fire and reduce the strength of transporting true qi.

The refining of the pill is a time-consuming and laborious work, once Li Ling enters the state of alchemy, it will take several days, sometimes even more than ten days, during this period, no one can disturb himself, otherwise, the pill is likely to fail.

Fortunately, Li Ling had instructed Hei Lin to wait outside his house in the past few days, alchemy is definitely not a sloppy thing, just like playing Go, every mistake will lose the whole game.

Li Ling's outdoors, Erwa has always been curious about what Li Ling is doing indoors, and often wants to peek, but is stopped by Hei Lin.

"Don't disturb you, Brother Li Ling's alchemy." Hei Lin pulled Erwa aside and said.

"Alchemy? What is Alchemy? Erwa touched the back of her head and said suspiciously.

"I don't know very well, anyway, it's just refining some round pills, after eating them, there can be many benefits, just like the Muscle and Bone Pill refined by Li Ling last time, it can strengthen the bones and tendons, so that a person has the space and strength to improve their strength, if it weren't for Li Ling's Muscle and Bone Pill last time, I wouldn't have been able to break through to the peak state of the City Saint Level." Hei Lin said quietly.

"Ah...... It turns out that the pill that was refined has so many benefits? Erwa said in surprise.

"Yes." Hei Lin laughed.

"However, I feel that alchemy should be very boring, Brother Li Ling, since he entered the room the day before yesterday, he hasn't come out yet, could it be that Brother Li Ling has been alchemy all along? Don't you even need to eat? Erwa said.

"Li Ling will have Xiao Huan Dan to supplement his physical strength, no need to eat, as for boring, alchemy is actually the most interesting thing for him, because, he himself said that alchemy is a delicate work, and if there is a little mistake, it will lead to the bursting of the pill, and even the decline of the pill level, so it is not boring constantly, and it is still very nervous, and he can't relax at any moment." Hei Lin said.

"Hearing Sister Hei Lin say this, I really want to learn alchemy." Erwa said excitedly.

"Then you wait for your eldest brother Li Ling to come out after alchemy, and then ask him to teach you." Hei Lin patted Erwa's forehead and smiled.

"Yes, I will beg him." Erwa grinned.

In the bedroom, Li Ling saw that the temperature of the green fire was rising again, which might threaten the Danpan and may cause explosion, so he had to slowly reduce the temperature of the green fire, which had already dropped once just now, but he didn't expect that it needed to be lowered again.

"It seems that this alchemy will take another seven days, and it will take a total of nine days, I hope you won't disappoint me and refine a pill that is not bad." Li Ling condensed his spirit, took out a small pill and took it to replenish the lost true qi and physical strength in his body. (To be continued......)