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Although it has now been promoted to mid-level Earth Grade, it does not have much substantial combat capability for the time being. It only has a great deterrent effect on evil creatures such as zombies.

If it was just to deal with the problem of the Xiangxi Corpse King, Xu Nuo might not be willing to carry such an evil thing with him. He also couldn't predict whether this poisonous insect would evolve into something even more terrifying if he continued to cultivate it.

After the corpse insect had completely digested the nearby zombies, Xu Nuo turned to the huge bronze alchemy furnace.

The mercury contained in it naturally cannot be ignored and wasted.

There is no doubt that this mercury was made from the high-quality cinnabar used in the royal alchemy in the past. Strictly speaking, it is a semi-finished elixir with excellent quality, making it the best choice for practicing Thunder Gu.

Xu Nuo took out the Panwang Bowl without hesitation, placed it above the mercury, and allowed it to slowly begin to absorb it.

In an instant, the mercury began to boil and turned into a colorful cloud of steam, which continuously poured into the Panwang Bowl.

The dust previously produced by the dissolution of the zombies was also driven by the energy in the Panwang Bowl to rotate, causing layers of smoke to rise.

At this time, Xu Nuo suddenly heard some noises with his "clairaudience". It turned out that Partridge Whistle was coming down from above to the vicinity of the Dan Well and was about to reach the bottom.

When Partridge Whistle faced the mercury vapor and black smoke rising from the Dan Well, he was instantly frightened and at a loss.

Although he was an experienced tomb robber, he was no stranger to the dangers of mercury vapor.

After all, many ancient tombs are filled with various mercury traps.

Mercury has an extremely high density, so if someone is trapped under it, it is difficult to escape and the person can easily be drowned and die.

In addition, inhaling mercury vapor can cause internal tissues to be squeezed and damaged by mercury particles, resulting in damage to the lungs, blood vessels, and internal organs, which is extremely miserable.

In comparison, small doses of poisoning are the mildest.

Coupled with the foul black smoke rising from below, the situation became even worse.

Partridge Whistle sighed inwardly at the misfortune.

It was impossible for him to escape by climbing the rope at this moment, and he was still thinking about his promise.

Xu Nuo was much faster than him and had already gone deep below.

In the current darkness, Xu Nuo is afraid that he will not be able to escape this disaster.

But at the moment of despair, Partridge Whistle heard a familiar voice from the Dan Well, from Xu Nuo.

"Hold your breath quickly! There is a black lacquered coffin a few feet away on the left, hide inside!" After hearing Xu Nuo's voice, Partridge Whistle immediately felt at ease.

Since you've promised to be safe, there won't be much of a problem.

He was unable to react for a moment because the black smoke was so fierce.

After calming down, Partridge Whistle quickly held his breath and covered his face with a black veil, and used his long-standing tortoise breathing technique - a technique that allows him to hold his breath for a long time in a confined space while avoiding the invasion of toxic gases. This is a life-saving skill in the ancient tomb.

After discovering the complete coffin under Xu Nuo's guidance, Partridge Whistle immediately entered it and closed the lid.

With the power of the Turtle Breathing Technique, he can hold on for at least half an hour.

Without hesitation, he entered the black lacquered coffin as Xu Nuo mentioned the moment he landed, closed the lid, and performed the tortoise breathing method, holding his breath.

Xu Nuo saw it clearly at this moment, and a reminder sounded in his ears.

"You have gained insight into the profound meaning of the Taoist monk Banshan's Turtle Breathing Technique and have suddenly realized something. You have now acquired the Innate Fetal Breathing Technique."

Sure enough, the fact that Partridge Whistle and Chen Yulou are as famous as each other is not unfounded.

His newfound skills were truly remarkable.

Although Partridge Whistle's turtle breathing technique is already amazing.

However, the innate fetal breathing technique that Xu Nuo comprehended was even more magical and was an orthodox breathing practice method of the Xuanmen sect.

It not only enables you to hold your breath for a long time, but also allows internal energy to circulate continuously throughout the body.

In addition to lasting longer, it can also move freely, even when fighting with all its strength.

In addition, when combined with the Zhengqi Jue, the Xiantian Fetal Breathing Technique can improve the absorption and flow efficiency of true Qi and quickly heal injuries in the body.

This is far beyond the ability of the Turtle Breathing Technique.

So Xu Nuo immediately started practicing the innate fetal breathing technique he had just acquired.

Because at this moment the Danjing was filled with mercury vapor and foul stench. Even though Xu Nuo was not very afraid of the poison, the smell was really uncomfortable.

Not long after, Xu Nuo, who used the innate fetal breathing technique, felt that his true energy was constantly circulating in his meridians, the breath in his Ren and Du meridians was continuous, and his internal strength was long-lasting.

Although he was in a completely non-breathing state, he could still move freely and even absorb the surrounding mercury through the Panwang Bowl.

About the time of one incense stick passed.

All the mercury vapor at the bottom of the Dan Well has been promised to be collected with the help of Panwang Bowl, and the surrounding air has returned to normal.

The bones turned into dust and disappeared along with the dust that filled the surroundings. Xu Nuo finally breathed a sigh of relief.

He casually played with the Panwang Bowl in his hand and was surprised to find that it seemed to be much heavier than before.

It must be because the several tons of mercury in the bronze alchemy furnace were all absorbed by the Panwang Bowl.

As the power slowly flows within the bowl, the originally dull lines on its surface actually begin to glow with a layer of silver light, making it look even thicker and more textured.

At this time, the mercury absorbed in the Panwang Bowl and the remaining lightning power on the thunder talisman were still constantly entangled and fused. If it was to be completely transformed into the thunder Gu, it would seem that some time would be needed.

Xu Nuo was not in a hurry about this. Soon, his eyes fell on a huge black lacquer coffin not far away.

Just now, Partridge Whistle has gone in to investigate the situation. Although this man is proficient in the art of breathing, it is not a good idea to stay in the coffin for a long time.

Just as he was about to reach out and open the coffin lid, Xu Nuo suddenly noticed that there was something unusual about this black lacquered coffin and couldn't help but let out a light exclamation.

It turned out that before, at the bottom of the Dan Well, due to the disturbance of mercury vapor, corpse gas and dust around him, he did not notice that the coffin in front of him was actually painted with exquisite colorful patterns, and was even inlaid with gold foil and gold thread.

In the picture, several fairies with graceful figures and elegant postures are dancing among the auspicious clouds in the fairy palace, or holding musical instruments such as pipa and harp, like beauties from heaven descended to the mortal world.

The picture is lifelike and the artistic conception is extraordinary, obviously the work of a famous artist.

What is even more amazing is that among these magnificent paintings are some special rune characters, which even the knowledgeable Xu Nuo could not recognize at first glance.

However, since he had learned something about calligraphy, he instantly realized that these characters were actually records of some ancient musical scores.

In an instant, Xu Nuo felt an ethereal and beautiful melody emerge in his mind, and a clear voice sounded: "You have glimpsed the mystery of the Tang Dynasty's "Rainbow Skirt and Feathered Coat", and realized a unique refining method - Feathered Coat Gu.

"

The so-called Feather Clothes Gu is an extremely rare type of Gu technique.

In the past, before Xu Nuo came into contact with the inheritance of the Gu King, he felt that all the Gu techniques in the world were full of weirdness and evil, and almost all of them were harmful.

However, after he obtained this ancient inheritance, he finally understood that many witchcraft techniques actually do not have negative effects, but can bring people unexpectedly powerful abilities.

For example, the Golden-patterned Toad Gu has the functions of finding treasure, gathering wealth and detoxifying; as for the Skeleton Gu, it can form bone armor to protect the body; and when the Feather Clothes Gu is successfully used, it will make the user feel as if they are wearing clothes woven from feathers, with extraordinary power of movement and leaping, which is truly amazing.

However, the materials needed for this kind of witchcraft are extremely precious and rare. It is necessary to select the feathers of some birds that carry spiritual creatures as raw materials. Xu Nuo might not be able to collect all the relevant materials in a short period of time.

However, he had no intention of urging him. After all, the practice of witchcraft required the word "chance". Only when everything was ready could success be achieved.

For example, he had already acquired the method of making Thunder Gu, but it was not until he stepped into the Dan Well and obtained the Thunder Talisman and mercury that he actually began the process of practicing Thunder Gu.

By the same token, the achievement of Yuyi Gu can only be put on hold temporarily, waiting for the right opportunity in the future to take action.

After thinking about it this way, Xu Nuo finally opened the coffin.

Partridge Whistle immediately opened his eyes and looked around, confirming that all the dangers in the surroundings had been eliminated. "The environment here is stable. There are quite a few tombs and burial objects below. You can notify Chen Yulou and the rest of the Xiling Clan to come down."

Xu Nuo then asked Partridge Whistle to inform the people waiting above to come down to assist in the search, while he himself went straight to start the inspection of the entire Danjing.

Although the burial objects in the coffins at the bottom of the Danjing were not very attractive to Xu Nuo.

Most of these coffins have been stolen by sorcerers and used for alchemy.

Most of the treasures inside, such as gold and jade, had been taken away.

Some of the coffins contained pearls, jade and other items used for preservation.

As the bones decayed into dust, these tiny pearls, jade, gold and silver jewelry also scattered on the ground.

Just leave these things to Xiling Lishi to search for.

After all, they are known for their meticulousness, and will not miss any details when searching from the ground to the soil several feet deep.

Now Xu Nuo's target is the elixir hidden at the bottom of the well.

When he observed the Dan Well earlier, he had vaguely sensed a strong scent of medicinal stones at the bottom.

The huge bronze alchemy furnace was placed in the center of the alchemy well.

Apparently, this was once the place where the Pingshan sorcerers made elixirs, and there must be a lot of finished pills around it.

These pills are external pills specially made for the royal family, so their quality is beyond reproach.

Although it is not realistic to achieve immortality or become an immortal,

But when it comes to building the foundation, training qi, and strengthening the body, it is quite effective.

This is exactly why Xu Nuo doesn't want to miss it.

I vaguely remember that when Partridge Whistle from another world entered this Dan Well, he saw the six-winged centipede using the elixir to heal its wounds.

Since even a powerful insect like the six-winged centipede can be recovered with the help of elixirs, it is obvious that there must be a lot of top-quality elixirs hidden here.

Unfortunately, the special aura has dissipated at this moment.

Xu Nuo could clearly sense the location of the medicinal stone without relying on the golden-patterned toad Gu - it was in a groove on the edge of the Dan Well.

He then put all the medicinal powder in all the bottles and jars into his own pot called Sun and Moon.

After a careful inspection with the help of the treasure identification ability, it was found that most of the pills were still in a semi-finished state.

It needs to be further refined in combination with other materials to fully exert its effect. There are a small number of finished pills, but the quality is relatively ordinary.