According to the theory of alchemy, in order for any elixir to be successfully refined, it must have all five elements, even if it is a single-attribute elixir, such as a fire-based elixir that drives away cold poison, it must also be paired with at least one water-based elixir as an auxiliary medicinal material to achieve the basic balance of the five elements.

But at the moment, there were only seven or eight kinds of medicinal materials in front of him, and only the three most valuable medicines, Lethe Flower, the Other Shore Flower and the Divine Plasma, were not added.

In terms of attributes, the two kinds of flowers should still be wood-based attributes, and the characteristics of god plasma should be water or fire.

Therefore, even if these three medicines are added, in the end, there is still a lack of earth-based medicines in order to make the five elements complete.

Could it be that the underworld is a world of incomplete elements?

Xu Chen was a little distressed, but he had already experimented to this point, and he couldn't give up halfway, so he decided to take some of the remaining three medicinal materials and refine them.

The first to be put into the Dan furnace was the Lethe Flower.

Because this Lethe flower was used to save the first batch of dormants, most of the petals had been taken, and there were still more than ten petals as slender as ice crystals left, and he only took one petal and threw it into the Dan furnace.

However, it was obvious that he was wrong, and the refining with the wood formation method quickly failed.

Looking at the petals that had completely and quickly turned into ashes in the spiritual fire, Xu Chen's face couldn't help but twitch a few times.

Although the Lethe flower was picked by him on the road, it was extremely precious to the Wind Clan, and there was no one near the Wind Clan for at least one day, and if you wanted to pick it, you needed to go farther away, but there must be a large number of extremely dangerous beasts hidden in the farther place, even if he didn't dare to run out blindly again to risk it again.

What's more, this kind of thing can be encountered but not sought, and it is not something you can find if you want to find it, it is completely up to luck.

Even now he couldn't even figure out the direction of the canyon he had come from.

Therefore, the current experiment, if you are lucky, you can succeed in two or three times, and if you are unlucky, you may fail all five times.

However, no matter how precious this thing is, it is not as precious as his small life, and the Lethe River Flower is a peerless elixir to the Wind Clan, but it is of no use to him.

Therefore, Xu Chen adjusted his mentality and threw a Lethe flower into the furnace again.

After deliberation this time, he activated the water system formation.

Because the Lethe flower grows in black water, and it can also emit a terrifying cold aura, most of the cold elixirs may have water-based attributes, so he is not completely brainless and blindly experimenting.

Sure enough, this time he chose the right one, the Lethe River Flower did not burn quickly in the water system formation, but exuded a billowing cold air under the stimulation of the formation, so that a layer of ice edges began to condense in the Dan furnace, and the suppressed spiritual fire was much smaller, and even Xu Chen's divine sense felt that there was an illusion like falling into an ice cave, as if the entire Dan furnace had turned into a lump of cold ice.

The level of Lethe River Flower must be very, very high, and it will definitely not be lower than the Blood God Grass.

Xu Chen once again made a new evaluation of Lethe Chuan Hua in his heart.

It takes a long time to refine the petals of Lethe.

First, the grade of Xu Chen's Dan furnace was too low, and it was not suitable for refining the third-grade spirit pill.

The second is that the level of the Lethe River Flower is too high, and the strength of the formation is not enough, so even the cold qi released cannot be completely restrained, so it can only increase the temperature of the spiritual fire to resist this cold qi.

However, even if Xu Chen used all his strength to stimulate the spiritual fire, and the white light and flames filled the entire Dan furnace, the petals of Lethe River were still like a 10,000-year-old cold ice for a long time, standing still under the baking of the spiritual fire, releasing a terrifying cold qi to suppress the spiritual fire very strongly, so Xu Chen had to urge the spiritual fire with all his strength.

Fortunately, he is now full of vitality and strong spirit, otherwise he would not be able to hold on for a long time.

Time passed silently.

Outside the stone room, the elders and patriarchs and a large group of people sat in the aisle outside and waited quietly, listening to the sound of roaring spiritual fire and cold air impacting and tumbling explosions coming from inside the stone room, and their faces showed both anxious and excited emotions.

Maybe it's a day, or maybe it's three or five days.

Just when Xu Chen felt that most of his vitality was consumed and his soul was starting to get a little tired, the petals of Lethe River finally began to melt, and under the continuous burning of the spiritual fire, the wisps began to collapse and melt.

Xu Chen finally breathed a sigh of relief, and continued to inject vitality to stimulate the burning of spirit stones with full concentration, while controlling the formation to continuously rotate and refine.

Almost the same amount of time passed, and finally the Lethe flower was completely refined into a crystal clear chalcedony essence.

However, it was not solid, but an extremely cold cloud, condensed into a mass under the suppression of the formation, in fact, in his powerful divine sense, he could see hundreds of millions of subtle ice crystal cold mist, which was still constantly changing and churning.

Although the refining was successful, Xu Chen did not have much joy on his face, but was very depressed, this is another water-based medicinal material.

There are three kinds of drugs of gold, wood and water in the Dan furnace, and there is still a lack of two systems of earth and fire.

But all that is left are the Flower of the Other Shore and the Divine Plasma, both of which are unlikely to be earth-based.

If the five elements are incomplete, I don't know if Hedan will succeed?

Xu Chen thought about it for a long time, and finally threw the god plasma into a ball, and then directly activated the fire formation.

Although he was quite sure that the god's plasma was water or fire, the things of the Netherworld were too strange for him to be sure.

Sure enough, the divine plasma was not successfully refined with the water and fire formations, and he had to use the earth formation test, but he didn't expect it to be unexpected again, this time it didn't take too long, and he refined a finger-sized lump of red liquid like chicken blood.

"Fuck you!"

After succeeding, Xu Chen was surprised and delighted, and couldn't help but burst out loud foul language, making the elders and patriarchs and others sitting outside look at each other.

Although they couldn't understand this, their emotions were clearly expressed, and it was not a good word.

The divine plasma turned out to be an earth-based medicinal material, which made Xu Chen extremely depressed.

However, after thinking about it carefully, he felt that it should be so, it should be that the god plasma is a strange thing formed by the wind people through the formation of the ancient creation pool, which is gathered from the bottom of the rocks, and it is actually normal to have earth-based attributes.

It's just that he didn't think much of it at first.

At the moment, there is only a shortage of fire-based medicinal materials.

Xu Chen rested for a moment, and he began to refine the other side flower.

However, this time he was unlucky, or he was completely wrong, and the other side flower used five formations successively and failed to refine them.

This made him discouraged and surprised.

There are only two possibilities for this situation, one is that the level of the Dan furnace is too low to refine the flower of the other side, and the other is that the flower of the other side does not enter the five elements, and it is not something that belongs to the rules of the five elements, and it has already transcended the concept of the mortal world.

Legend has it that a monk who refines his gods can jump out of the Three Realms and not enter the Five Elements.

And all the heaven and earth spiritual creatures that have reached the level of the virtual realm have begun to transcend the five elements, and they can no longer be distinguished and measured by the knowledge and theory system of mortal realm cultivators.

According to the legends of the mortal world about the underworld and the flower on the other side, it is extremely likely that this kind of thing does not enter the five elements.

In addition, according to the Wind Clan, the other side flower can purify people's spiritual energy and blood poison, which is almost reborn, which also shows that this flower has an effect that is almost against the sky, and has completely transcended mortal items, reaching another completely untouchable height.

Xu Chen sat in front of the Dan furnace in a daze, his mind turning over the river and the sea.

At present, all the medicines in the underworld have been refined, but only the fire-based medicinal materials are missing.

According to the knowledge of alchemy in the mortal realm that he had accumulated, the theory that the five elements could not be combined with the Dan, and there was a high probability that this furnace pill would not succeed.

What's more, these strange medicines are not supported by any Danfang theory at all, and they all rely on his blind and trouble-making mess, so the probability of success is even lower.

"I don't know if the fire elixir that fuses into the same mortal realm will be successful?"

After being silent for a long time, Xu Chen muttered, and then gently wiped his hand on the Xuanjin bracelet, and instantly there was a golden-red spirit fruit that released a blazing spiritual light.

Jinyang Fruit, a second-level elixir, the main material for refining the second-grade Chiyun Pill, was given one by the senior brother at the beginning, and later more than ten were made in the Yuqing Palace.

This kind of elixir is also precious in the mortal world, but it is not commonly used as an alchemy elixir, so Yuqing Hall does not attach great importance to it, so when he visits the medicine garden, he even eats and takes it, but he has never used it.

The Jinyang Fruit was put into the alchemy furnace, and the next thing was the alchemy method that Xu Chen was most familiar with, after being imprisoned with the fire formation, he slowly baked and refined it with spiritual fire, and about two moments later, the Jinyang Fruit was refined into a ball of golden-red essence.

Alright, get ready for Hedan!

Xu Chen rubbed his hands and felt his heart beating a little fast.

Soon, the Hedan formation was activated.

Although there was no pill formula, Xu Chen still relied on his alchemy experience and abundant theoretical knowledge, and according to the principle of the five elements of mutual growth and restraint, he introduced these eight flavored medicinal materials into the Yuan Qi vortex and began to fuse.

And the process of Hedan surprised Xu Chen, there was no violent reaction, these refined medicinal materials naturally fused together, and finally slowly turned into a mass of colorful mixed medicinal mud, and then under the continuous rotation of the formation, the colors of the medicinal mud began to mix evenly together, and finally turned into a ball of blue-purple mud paste.

After the plaster slowly took shape, Xu Chen directly introduced a large cloud of white qi into it.

According to Xu Chen's thoughts, the elixir he wanted to cultivate must be able to stimulate the dormant to repair and awaken, and it must be integrated into the white qi.

In the final analysis, all other medicinal materials are not important, and the important thing is still white qi.

However, his purpose was to get rid of all the manual process of helping the sleeper to repair his body.

Like the previous alchemy, after the white gas entered, the spiritual fire suddenly became violently restless, burning while constantly trying to incinerate the white qi, driving the Dan furnace to also violently shake and shake, making a bang-bang bang-bang blaster-like sound, and the ground smashed under the beating of the Dan furnace kept vibrating, making the elders and patriarchs sitting outside all nervous and worried.

However, the door of the stone room was closed, and everyone couldn't see it, and they didn't dare to release the power of their souls to go in to visit the situation, for fear of affecting Xu Chen's work.

In the face of the uncontrolled restlessness of the spiritual fire, Xu Chen had long been accustomed to it, so he constantly imported the vitality to forcibly suppress the spiritual fire, and carefully controlled the white qi and the medicinal mud to fully fuse.

(End of chapter)