Immortal cultivation starts with copying.

Of course, Chen Yunhao had anticipated that his strength would decline.

But having an extra clone to do what he wants is equivalent to having an extra life. Overall, the benefits outweigh the disadvantages.

As for the decline in the strength of the body, it can only be compensated in other aspects.

Chen Yunhao's mind moved, and a Nascent Soul flashed out from his Dantian, looked back at Chen Yunhao, and then sank into the Dantian of his clone.

Although there are several materials for refining the clone, each one is carefully refined by Chen Yunhao and infused with a lot of his own magic power.

The clone has the same Nascent Soul aura as his own, so there is no problem of rejection.

After the Nascent Soul entered the clone, the aura of a cultivator slowly emanated from his body. The pressure emanating from his body showed that the clone's strength was between the Spirit Transformation and Void Refinement stages.

Chen Yunhao's own Nascent Soul was at the level of Lianxu, but the strength of his clone was only at the level of Huashen.

Due to material limitations, the clone failed to break through the level of refining emptiness when it was first born.

This problem is easy to solve. You just need to practice hard and you can improve.

Through practice, one can use spiritual energy and magic power to gradually change the physical body of the clone. This is what it means to make up for innate deficiencies through acquired means!

Of course, there is another way, that is, after Chen Yunhao uses his clone to return to the lower realm, because his strength is equivalent to the great perfection of the Spirit Transformation, he will still have to go through a tribulation.

After passing the tribulation in the lower realm, the physical body will undergo fundamental changes, and the strength will reach the level of refining emptiness in one fell swoop.

It is still unknown how long it will take to break through the boundary and reach the lower realm. It may take decades.

During these few decades, Chen Yunhao did not plan to let his clone practice.

Because once the clone has cultivated to the level of refining emptiness in the spiritual world, there will be many restrictions when returning to the lower world, and its strength will be greatly reduced.

It would be best to maintain the current state, and you will be the top existence when you return to the underworld.

There is only one last step left to refine the clone, and this step will be a bit painful.

It means separating a part of your own soul and moving it to the Niwan Palace of your clone.

This step requires enduring soul-wrenching pain, but that’s not the worst part. The most important thing is that there is a hint of danger.

However, how to separate the spirit and soul is only part of the whole set of skills for refining clones.

This set of skills was taught to him by the spirit of the weapon. It is not ordinary and is not an ordinary item. As long as he performs the spells step by step, there will generally be no danger.

Chen Yunhao was quite confident in his skills and the spirit of the weapon, so he didn't take the pain seriously.

Chen Yunhao was seen muttering something, making a few hand gestures with his hands, and then placing his left and right hands on his temples respectively.

After only a cup of tea, large beads of sweat began to roll down Chen Yunhao's forehead.

His face turned pale in an instant, and his whole body began to tremble slightly, and his teeth were chattering, which showed that he was in great pain at this time.

Fortunately, this process did not last long. After another cup of tea, a faint shadow floated out from Chen Yunhao's forehead and flashed into the forehead of his clone.

Only at this moment did Chen Yunhao let out a sigh of relief, and he slumped to the ground, not wanting to move even a finger.

He knew that severing the soul was extremely painful, but he had never imagined it would be so painful. He definitely didn't want to try it a second time.

“Are you okay…?”

The clone who was slowly getting familiar with the body asked with concern.

“Nothing…!”

Chen Yunhao let out a long sigh and waved his hand.

"Get familiar with your body as soon as possible, but don't practice yet. You can read some classics and learn some skills first..."

The clone only has part of Chen Yunhao's original memory, and he still needs to learn many things from scratch.

During the next few decades in the underworld, learning was his main task.

The clone looks exactly like Chen Yunhao, with almost no difference in expression, movements and tone.

Chen Yunhao looked at the clone as if he was looking at himself in the mirror, and had a special feeling.

Then Chen Yunhao waved his sleeves and put his clone into the ancient mirror space, allowing him to experience and learn in that illusory world of ancient and modern times.

So far, Chen Yunhao's big task has been mostly completed. It has only been more than three years since he entered the Demon Sealing Mountain. I wonder if the seventh-level demon outside the formation is still there?

But he didn't dare to inquire about it easily, for fear of alerting the enemy and making things worse.

More than three years of effort is like a drop in the bucket compared to the long lifespan of the demon race.

So Chen Yunhao still had to control his temper and continue hiding for a while.

I have just made a breakthrough, so there is not much point in practicing further. The clone has also been refined, so there is nothing important to do.

There are just some trivial things left, so I took this opportunity to do them all.

For example, Chen Yunhao obtained dozens of demon flowers in Fengmo Mountain, and he happened to have the recipe for refining soul-binding incense, and other spiritual medicines were also available.

This recipe is relatively rare. Precisely because the source of the main elixir, the devil flower, has been lost, some people sell it as an ordinary recipe.

As an alchemist, Chen Yunhao likes to collect various alchemy recipes wherever he goes.

He has traveled to countless places in the world. Without exaggeration, the number of pill recipes he has in his hands is even more than the collections of some medium and large sects.

Take this opportunity to refine the soul-fixing incense in case of emergency.

Although this soul-fixing incense is a spiritual object developed only for the demons, it has no effect on human cultivators.

However, the human and demon worlds often intersect, causing the barrier between the two worlds to become weak, and demons would occasionally break into the spiritual world.

Therefore, it is better to keep this soul-fixing incense on hand as you never know when it might be needed. Even if you sell it, it can be worth a lot of spirit crystals.

Also, as his cultivation level improves, he also needs to take some matching elixirs.

This time, we harvested a large number of spiritual medicines that are more than a thousand years old in Fengmo Mountain, which is just enough to research and refine several high-level spiritual pills.

At least it can solve the problem of lack of elixirs in the refining stage and even in the fusion stage.

The weapon refining skills can also be improved appropriately. As for the formation, it is not something that can be achieved overnight. Just take a little time every day to study it.

The study of formations is something you have to learn throughout your life and there is no need to rush.

There is also the Pangu Creation Art, which is now his main practice method.

A few days ago, the spirit of the weapon improved the Pangu Creation Art for him. It was not an improvement, but a supplement!

Because Pangu Kaitian Jue is already a top-notch martial art and cannot be improved.

However, after the weapon spirit devoured the soul of the magic dragon, its strength recovered a little. Of course, its memory also recovered a lot, and it remembered more things.

According to the spirit of the weapon, the Pangu Creation Art was created by one person alone.

The Pangu Creation Technique that was taught to him at the beginning was the martial arts technique that person had created. It was incomplete and of a lower level.

The Pangu Creation Technique that was handed down to him now was a technique that had been improved in the later period. As for whether there would be a more complete and advanced Pangu Creation Technique later, the spirit of the weapon could not remember it for the time being.