Lin Feng was very lucky, and there were almost no problems in the subsequent refining process. If he could continue, the first Great Return Pill would be successfully refined within a few days.

With this elixir, although I can't say that I can recover much strength, I can at least recover some serious injuries in my body.

The fusion process was not so smooth. After all, Lin Feng's current condition was not that good. Both his soul and body were seriously injured, so the process was not as easy as he imagined.

Even though Lin Feng had wrapped the other parts with spiritual energy and then extracted a separate part for fusion, he still encountered great difficulties.

The first dose of medicine had only been nearly half fused, and Lin Feng felt that the power seemed to be insufficient.

He was not careful and had some control. He just heard a squeaking sound, and the fused medicine was burned and turned into a ball of ashes. A thick black smoke came out from it.

Lin Feng waved his right hand, and the stove lid immediately flew up. The black pill was quickly thrown out and fell on the 460 wall.

Lin Feng stretched out a finger and pressed it in the void. The elixir was immediately crushed into powder by a force, and the black smoke that continued to emerge was also suppressed in it.

"Sure enough, the current situation is a bit overwhelming."

Lin Feng sighed softly, and with a move of his fingers, the remaining nine fusion elixirs wrapped in spiritual energy floated out, and fell into nine jade bottles under Lin Feng's control.

With another wave of his hand, the nine corks were accurately placed on the nine jade bottles, sealing them completely.

After taking back the spiritual energy, Lin Feng breathed a sigh of relief.

Just now, he was still a little too overwhelmed, thinking that relying on those auras would be enough to successfully fuse it, but halfway through the fusion, he already felt that he was unable to do what he wanted.

But at this time, it was already too late to transform and take back the power, which resulted in this result.

However, it doesn't matter if one part is damaged. Due to the Yao family's enthusiasm, several parts of the medicinal materials have been prepared. Even if there are some mistakes, it doesn't matter.

Taking a deep breath, Lin Feng performed the fusion again. This time with sufficient spiritual energy support, the speed and efficiency of the fusion were much improved.

The burning of the flame continued for a long time, until the solution of the medicinal materials was refined into a very small drop. Lin Feng stopped the burning and put it into a jade bottle.

After sealing the lid. Lin Feng placed the jade bottle near the stove.

Due to the difference in current conditions and equipment, Lin Feng was unable to keep this thing warm. Once the coldness of the bottle collided with the hot temperature of the liquid inside, it would most likely burst the bottle and destroy the medicine.

Therefore, he could only use this clumsy method to place it near the stove so that it would always be affected by the temperature and maintain a constant temperature.

After finishing the first batch, Lin Feng also breathed a sigh of relief. Refining the elixir in his current state would obviously be a lot more troublesome.

But as the saying goes, once you learn something twice, it becomes familiar. After you have the experience once, it will be much more convenient to do the second time.

A few hours later, the remaining eight parts were all fused, forming drops of bead-like liquid essence.

After finishing the last portion, Lin Feng breathed a sigh of relief, wiped the sweat from his forehead, and rested for a while.

Although he had gained experience in the previous steps and became more and more proficient in his techniques, after all, the difficulty of control was several times more difficult than at the peak, and even he spent a lot of effort.

Taking a deep breath, Lin Feng continued to refining.

Now the temperature in the room has risen a lot due to the barrier and the influence of the flames. Although this makes him feel a little uncomfortable, this environment is more suitable for refining elixirs.

After taking a short rest, Lin Feng continued to refine. With a move, one of the treasure chests was opened again, and something like a pebble was thrown into the furnace.

This thing looks extremely smooth, like a very beautiful pebble, but in fact, this thing is actually a drop of resin.

Different from ordinary resins and synthetic ones, this thing comes from the resin of the black iron tree in the southern sky jungle.

As its name suggests, this thing is just like the black iron tree that secretes it, with an extremely strong body. Therefore, at first glance, ordinary people may even think that this thing is ten jade stones.

Because of its appearance, it is often used as an ornament by female members of some large families, hanging on their bodies like pendants.

But as everyone knows, this thing is actually a treasure.

It is said to be a treasure, but this thing is not that rare. It is just that very few people know how to use it, and it is more troublesome to use it.

It has a wide range of functions. On the one hand, it is a Supreme Grade medicinal material used in refining elixirs. On the other hand, it is also an important raw material for imperial families to preserve the corpses of their ancestors.

However, the use of the latter is generally known to only a few people. Most people regard it as a decoration. Only a few strong men and some knowledgeable alchemists know that this thing is actually a medicinal material.

Among the many medicinal materials in the Great Return Pill refined by Lin Feng, there is something.

As soon as the resin jumped into the stove, it burned violently.

At this moment, Lin Feng's expression was also very solemn. He could be said to have exerted all his energy and carefully controlled the flame to keep it in a temperature state with extremely small changes.

This is a test for Alchemist. The resin itself is extremely flammable, even if it is condensed from iron trees.

Once it encounters high temperature, it will burn quickly, and what Lin Feng has to do is to reduce the temperature to an extremely low temperature to make it burn slightly.

This step is extremely difficult to operate, but it is also extremely necessary. Only by burning out the excess impurities can the most essential part be used as medicinal materials.

Once the impurities are not removed cleanly enough, the medicinal properties will tend to be gone.

Although this resin crystal is not small, it is about the size of a longan, but the final trace of medicinal properties that can be used together may not be as big as an embroidery needle.

Therefore, this burning process takes longer than the previous step.

The previous ones together only took three hours, but it took more than ten hours to burn this little resin. By the time Lin Feng finished burning it and condensed the essence, it had already It was dawn the next day. .

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