In the depths of the main hall, it is deep and dark, and the underground world is like a furnace, but here it is very cool, very strange.

Yi Yun followed the little girl to a Dan room.

The huge Dan furnace was located in the empty stone hall, the Dan furnace was cold and covered with dust, and next to the Dan furnace, there were some black scrolls.

These black scrolls were extremely old and had been covered with a thick layer of dust, Yi Yun brushed away the dust with his own vitality, and probed his perception into these scrolls, and in an instant, he felt as if his perception had been sucked in.

This is...... A magic weapon for recording data?

In the world of martial artists, the general record materials are jade slips, and the capacity of jade slips is already very large, and it is generally enough, but this kind of black scroll specially refined for recording materials records more information.

Yi Yun walked over and opened the black scrolls and looked at them, most of these black scrolls were medicine refining notes, as well as various prescriptions.

Most of these prescriptions were extremely complicated, and according to the records on the black scroll, the effect of the elixir refined by this part of the prescription could be called against the sky, and it was even so strong that Yi Yun couldn't believe it.

Some of these pills and relics can be used for the Divine Monarch to break through the realm, and even, Yi Yun also saw several prescriptions, each of which used a full black scroll to record, and the amount of information recorded in this black scroll was more than a hundred times larger than that of Yu Jian, but it was only used to record one prescription.

And the finished elixir of this prescription is prepared for the realm above the Divine Monarch......

Above the Divine King?

Yi Yun took a breath of cold air, so far, the realm above the Divine Monarch, Yi Yun still feels very vague, but he is sure that the Divine Monarch is by no means the end of the martial arts, the woman in black who created the Aoki Great World, her realm is definitely more than the Divine Monarch.

There is also the bronze giant, whose strength strength also greatly exceeds that of the Divine Monarch.

Seeing this, Yi Yun already understood that the owner of these black scrolls was a pharmacist, or rather, a medicine god.

The alchemist and the desolate heaven master are in the same line, but the material of the desolate heaven master's refining relics is the bones of demon beasts, while the materials of the alchemy of the dan master are various spirit plants, because the previous fields of the two do not overlap, and the energy extraction between the demon bones and the spirit plants is very conflicting, so few pharmacists are involved in two fields at the same time, either majoring in the desolate heaven art or majoring in the cultivation of the pill art.

In the Yang God Emperor Heaven, because the number of demon bones is not as good as that of the spirit plant, most of the pharmacists are practicing alchemy, and there are very few desolate heaven techniques.

But the pharmacist in front of him, he practiced the Wild Heaven Technique and Alchemy together, and his achievements in both aspects can be called the pinnacle.

Yi Yun was also proficient in the Heavenless Arts, but compared to the person who left the black scroll, it was a world of difference.

Yi Yun continued to read, most of the black scrolls were used to record prescriptions, relics and pills accounted for about half, and their refining methods were more complicated than the other, Yi Yun didn't have time to look at them one by one, he just looked for something useful to him first.

Until...... He saw a black scroll that was almost completely empty, this black scroll with a capacity of a hundred times that of Jade Jian, it only recorded a few paragraphs, and it was this paragraph that made Yi Yun's heart tremble.

It took Yi Yun more than a dozen breaths to read a few hundred words, and after that, he looked around in astonishment, and he finally understood in his heart how the sea of burial sun sand came from.

According to historical legends, the sea of sand was formed by the fall of the sun. According to the deduction of Grandpa Ji Shisha, the land of the sunshine for hundreds of millions of years has given birth to a yang essence here.

But in this scroll, Yi Yun knew that this great desert of the sunshine was actually the burial place of this medicine god.

The fire he buried was the divine fire in the body of the God of Medicine!

The world is full of wonders, and many mysterious places will condense mutated fires and mutated fire spirits because of various coincidences, and a small flame can incinerate the heavens and the earth.

These fire spirits and tinders can be discharged in different grades according to their power. And the top Desolate Heaven Masters and Alchemists, they will search for the world's fire essence and fire seeds, refine them into their bodies, use them for their own use, and use them to refine medicines.

The same is true of this god of medicine.

And he did this to the extreme, before he became the god of medicine, in the ruins outside the twelve emperor heavens, he obtained a mysterious flame of unknown grade outside the records of the classics - the evil god fire.

With the help of this flame, and his extraordinary talent, he became the god of medicine.

And after he became the god of medicine, he got the top three flames of the Twelve Emperor Heavens - the Heavenly Emperor Pure Fire.

When the two flames met, what made the medicine god feel incredible was that the two flames actually fused.

And the flame after the fusion is still dominated by the evil god fire, and it can even be said that the black evil god fire from the ruins slowly devoured the pure fire of heaven and earth.

Since then, the God of Medicine has begun to consciously cultivate the evil god fire, and his alchemy skills have slowly reached a height unimaginable to the world.

The God of Medicine was born in the Yang God Emperor Heaven, but his powerful days were spent in the ruins.

Until his time limit was approaching, he returned to the Yang God Emperor Heaven, and buried the evil god fire in the Yang Sand Sea.

Because of the burial fire, the area of the burial fire is thousands of miles around, filled with the breath of the sun, the forest withered, the lake evaporated, the mountains and rivers weathered, and finally turned into a large desert.

Since then, there has been a legend in the Fuyang Sand Sea, saying that it was a round of dawn that fell into the mortal world and formed this sand sea.

The medicine god chose to bury the fire here, no one knew except him, the place where the fire was buried was covered by the medicine god with a formation, and no one could find it at all, until hundreds of millions of years passed, the formation energy was almost exhausted, and the place where the fire was buried began to be slowly exposed.

By the past few months, the visions of heaven and earth had covered a radius of millions of miles, attracting heroes from all over the world to explore.

However, no one will know that this small sea of burial sand hides such an amazing secret!

Otherwise, the entire Yang God Emperor Heaven, and even other Emperor Heavens, there will be peerless masters here to explore the location of this divine fire.

It's really ...... It's been too long.

Hundreds of millions of years have passed, coupled with the fact that the God of Medicine has set up a large array and deliberately concealed it, no one would have thought that the Burial Yang Sand Sea would be related to the God of Medicine hundreds of millions of years ago.

As for why the God of Medicine buried the fire in the Burial Yang Sand Sea, and why he laid out a formation to hide all this, in order not to choose any heirs to inherit his inheritance, but for his own daughter-Ling Xiaoxiao!

In the last ten million years of the God of Medicine, he had been pursuing the two peaks of alchemy.

One is - Immortal Pill!

One is - Resurrection Pill!

The former makes people immortal!

The latter brings the dead back to life!

Both of them are against the sky to change their lives and go against the way of heaven.

The God of Medicine arranged this burial fire in order to refine a resurrection pill to save his only daughter, Ling Xiaoxiao, who had been dead for tens of millions of years at that time!