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Seal the other two soul-inducing grass leaves again.

Then, Qin Sang distributed a stream of spiritual power to wrap around the leaves, and at the same time activated the secret method in the "Tianyin Corpse Art".

Waves of spiritual power surged like rivers, meeting in front of Qin Sang, forming countless mysterious runes. The light of spiritual power made the cave sparkle.

Finally, these runes merged into one, and a little dark light suddenly appeared in the center of the spiritual power. ,

Upon closer inspection, it turned out to be a cluster of flames.

The flame gradually grew stronger and grew into a fist-sized flame, burning fiercely. The runes seemed to become a furnace, and Qin Sang's spiritual power was the fuel.

The flame was still dark black, burning right in front of Qin Sang, but not only could he not feel the heat, but he felt a coldness emanating from the flame.

This is a secret method using the "Tianyin Corpse Art" to generate Yin Fire, which is specially used to refine the soul-inducing grass.

By activating the Yin Fire, the spiritual energy is consumed very quickly, but Qin Sang is already at the middle stage of foundation building, so there is not much pressure, and there is no need to worry about the spiritual energy drying up during the refining process.

He looked at the Yin Fire, then at the Soul Attracting Grass, and pondered for a moment. He did not rush to throw the Soul Attracting Grass in, but concentrated on manipulating the Yin Fire.

Under Qin Sang's control, the circular flame began to change, sometimes stretching and sometimes being compressed.

At the beginning, the change was very slow. Qin Sang frowned slightly and felt a little labored. Gradually, the change became faster and faster, turning into birds and animals, vivid and vivid, while Qin Sang's expression became more and more relaxed.

"go!"

Qin Sang stretched out his hand and threw the soul-inducing grass into the Yin Fire.

The Yin Fire suddenly expanded and completely enveloped the Soul-Inducing Grass. Clusters of tiny flames began to burn on the Soul-Inducing Grass.

In the blink of an eye, an hour passed, and the soul-inducing grass was still lying quietly in the yin fire. Except that the luster on the surface dimmed a bit, there seemed to be no change in other places.

There was no anxious look on Qin Sang's face.

At this time, he closed his eyes tightly and sat cross-legged on the wooden bed, focusing his whole body and mind on the flames in front of him, without any distractions.

As time went by, the first crack finally appeared on the soul-inducing grass, and then the cracks began to become more and more dense, as if they would be shattered by a light touch.

In fact, the soul-attracting grass shattered by itself without anyone else touching it.

A more accurate description is that it melts and becomes a black liquid.

The soul-inducing grass was finally refined by Yin Fire!

Qin Sang secretly breathed a sigh of relief, but still couldn't relax. Refining the soul-inducing grass was just the beginning. Later, the impurities in the soul-inducing grass would be refined, leaving only the essence!

Under the burning of the yin fire, the volume of the spiritual liquid gradually became smaller. It was originally the size of a baby's fist, but now there was only a drop left, but the color became darker.

Like ink.

From the beginning to now, this process lasted three full days, and it was finally completed!

The impurities of the soul-inducing grass have been refined, but its texture is still intact. This is the key to refining the Heavenly Corpse Talisman later. This step has extremely high requirements on the refiner. It not only requires enough patience, but also extremely high requirements. Precise control, one oversight will result in failure.

Withdrawing the Yin Fire, Qin Sang opened his eyes and looked at the drop of spiritual liquid. There was a bit of exhaustion in his eyes, but more of it was excitement. He didn't expect that the most difficult step of refining the Heavenly Corpse Talisman for the first time was successful.

After taking a short rest and waiting for the Qi Sea to recover a little, Qin Sang continued refining without stopping.

The spiritual liquid was suspended in front of Qin Sang. Qin Sang's face darkened. He abandoned unnecessary thoughts, raised his hands, and formed various hand seals. His fingers flew faster and faster, leaving behind a dazzling afterimage.

As his handprints changed, countless mysterious runes were born, and then were immediately poured into the spiritual liquid.

The spiritual liquid seemed to come alive and kept squirming. It began to fade away from black, the color became lighter and lighter, and the shape became more regular...

Finally, a rectangular corpse talisman is about to take shape!

However, it's not the end yet.

Qin Sang kept moving, and at the same time he was multitasking. He split a ray of soul from the soul, quickly condensed it into a soul mark, and embedded it in the Heavenly Corpse Talisman.

Done!

Qin Sang breathed a long sigh of relief and looked a little pale. More than half of the spiritual power in the Qi Sea was consumed. It can be seen that refining the Heavenly Corpse Talisman is indeed not easy.

The sky corpse talisman is no longer black, but glowing with transparent gray.

As thin as a piece of paper, as gray as gray jade, only the size of a thumb, exuding a mysterious aura, with a mysterious glow that flows according to a certain pattern.

Like the stars in the night sky, they are looming and intoxicating.

Qin Sang held the weightless Heavenly Corpse Talisman in her palm and looked at it carefully.

From the outside, the Heavenly Corpse Talisman is so beautiful, but little does anyone know that it is actually a very sinister and evil thing that can be used to refine living corpses!

This contrast made Qin Sang secretly sigh.

Qin Sang did not rush to refine the living corpse. Instead, he took out a jade box and sealed the first Heavenly Corpse Talisman, preparing to strike while the iron was hot and continue refining it.

"It doesn't seem too difficult..."

Qin Sang talked to himself and relaxed.

Unexpectedly, before he could be proud for too long, a lesson came. The refining of the second Heavenly Corpse Talisman failed.

Of course, the reason for the failure was not that Qin Sangzhi was complacent and was negligent.

Failure is actually normal. Refining the Heavenly Corpse Talisman is very difficult. Qin Sang can only succeed at it. It can only be said that he is lucky.

Qin Sang knew this and was not depressed at all. He waved his hand to destroy the remaining soul-inducing grass, summed up the experience of failure, and continued to refine the third one.

Three days later, another Heavenly Corpse Talisman was made!

One soul-attracting grass was turned into two Heavenly Corpse Talismans, and Qin Sang was very satisfied. After these three refinings, he has gained enough experience and believes that the success rate will be higher in the future.

Eight days had passed just to refine the Heavenly Corpse Talisman.

Calculating the time, Yun Youzi estimated that he was almost there, so Qin Sang did not continue, but took out the living corpse embryos he had prepared before from the corpse bag.

According to the "Tianyin Corpse Jue", there is a big difference between living corpses and evil corpses, and the requirement for the Tianyin Corpse Talisman is only one of them.

Since the Qi sea of ​​the living corpse is intact and has not been exhausted, when building the foundation of the Five Elements, a larger amount of Five Elements Yin objects and Earthly Evil Qi are needed.

The specific amount will vary depending on the specific situation, but it is at least several times that of refining the evil corpse.

Although the Five Elements Yin objects are expensive, they are not difficult to buy, and Qin Sang is well prepared.

There is not much earth evil spirit left.

The evil energy of the earth is the most sinister thing in the world. Foundation-building monks are also afraid of it, and weapon refining is rarely used, except for some rare special magic weapons inherited from ancient times.

Over the years, Qin Sang had seen several places in the Ancient Immortal Battlefield that contained evil spirits, but there was no place similar to the Sinking Cave in the Shaohua Mountains.

Therefore, the energy of Earthly Evil has been being consumed and cannot be replenished, and the refining of Evil Corpse is not always successful, so it is inevitably wasted. Now there are only three bottles left.

Qin Sang took out the three Shaoyin magnetic bottles and thought to himself.

In case the earth evil spirit is not enough, it is time to go back to Shaohua Mountain.