Immortal cultivation starts with copying.

Chen Yunhao has refined the rejuvenation pill at least thousands of times, and he can't make a mistake in the entire refining process even with his eyes closed.

But this was a refining process that he attached great importance to, and he took every step very seriously.

The required spiritual medicines were also purchased from the spiritual world, and they were all ordinary spiritual medicines that were hundreds of years old.

Starting from preheating the alchemy furnace to putting in the elixir, you have to start from the moment the elixir enters the furnace.

Through special spells, the spirit of plants and trees can be extracted before the elixir turns into spiritual liquid.

Chen Yunhao quickly made a few hand gestures with his hands, then stretched out his right hand and pointed at the elixir in the furnace with two fingers.

A barely perceptible green light quickly floated up and sank into Chen Yunhao's palm, and then the elixir turned into spiritual liquid.

This was the first step in completing the infusion of spirits. In this way, every time Chen Yunhao put in a spiritual medicine, he would extract its plant spirit.

Refining the Rejuvenation Pill is quick because it only contains a few spiritual herbs and is one of the most basic fourth-level spiritual pills.

In less than half an hour, all the spiritual medicines turned into spiritual liquid. This was the most important second step, the real spiritualization.

This second step must be completed before the pill is divided, and it is not as simple as just injecting the extracted spirits of several plants into it.

First, the extracted spirits of plants and trees must be combined into one, and then integrated into the spiritual liquid.

The method of integration is also very particular. Because the spirit of plants and trees cannot withstand the scorching heat, a small formation must be placed on the fused spirit of plants and trees.

Therefore, infusing spirits is not a simple sentence, but a series of complex operations, and even the slightest mistake cannot succeed.

He had practiced these steps on the floating island to the point of vomiting, but he was still a little nervous when actually refining them.

A small ball of faint green light floated out from the palm of his hand. Chen Yunhao made a few hand gestures towards the green light, and then a faint white light appeared on the surface of the green light.

Then the green light suddenly sank into the spiritual liquid, and then Chen Yunhao immediately increased the speed of his hand gestures.

This ball of spiritual liquid rotates rapidly in the alchemy furnace, which is a step to completely merge the spiritual liquid with the spirit of plants and trees.

After this step is completed, the next step is to divide the pill and make it into elixirs.

Although the most critical step of infusing the spirit has been completed, I dare not relax at all in the following steps.

Especially the temperature control, because the small formation protecting the spirit of plants and trees can only be maintained for a limited time.

Chen Yunhao looked solemn and completed all the steps meticulously. He didn't breathe a sigh of relief until he finished the last spell and the pill was completed.

This batch of elixirs is the first batch of true fourth-level elixirs he made after fully mastering the Yimu alchemy technique, and it is of extraordinary significance!

This also means that Chen Yunhao has truly advanced to the fourth-level alchemist.

Chen Yunhao waved his hand towards the alchemy furnace, and six rejuvenation pills fell into his hand.

This was the first time I actually refined it, and although the whole process went smoothly, the result was not satisfactory.

Because he only produced six elixirs, if he was on the floating island, he should have produced at least eight elixirs.

After carefully recalling the entire refining process, it seemed that there was no problem with every step.

The only problem was the alchemy furnace. His alchemy furnace was obtained from the Tianyuan Realm, and it was a top-grade magic furnace.

If the alchemy furnace is replaced with a spiritual weapon level, there will be no problem in producing eight pills.

He carefully looked at the rejuvenation pill he had refined in his hand, and even took out a rejuvenation pill that he had refined in the Tianyuan Realm.

Comparing the two elixirs together, the difference becomes clear.

From the appearance, the elixir patterns and the size and color of the elixir are almost the same.

However, the rejuvenation pill he refined in the Tianyuan Realm had a much dimmer glow on its surface.

However, the rejuvenation pill he had just refined seemed to be very effective.

Although there is only this one difference, the efficacy can be at least 30% different.

When he was in the lower world, he often heard people say that high-level elixirs would be spiritual and would escape on their own the moment they were made.

In fact, it refers to high-level elixirs that are endowed with spirituality.

In any case, this was a milestone beginning, and then Chen Yunhao started to refine another batch of divine water pills.

This is a kind of elixir with water attribute. It is more difficult to refine than the rejuvenation elixir, but it is also one of the basic elixirs of the fourth level and is suitable for cultivators with water spiritual roots.

After refining the Divine Water Pill, he also obtained six spiritual pills.

Moreover, the divine water pill was sparkling with water, and it looked like it was of better quality than the rejuvenation pill.

The fourth-level elixir is also divided into four types: high, medium and low. The rejuvenation elixir he refined in the first batch was of low quality, while the divine water elixir he refined in the second batch was upgraded to medium quality.

It doesn't mean that he was able to advance to the next level with just these two furnaces. In fact, he could even refine top-quality products on the floating island.

So in reality it should not be much different, it's just that very few are refined. It is not impossible to truly refine a fourth-grade top-grade elixir in time.

This time, he could clearly feel that the alchemy furnace was holding him back. He would definitely change the furnace next time he came out of seclusion.

Afterwards, Chen Yunhao entered the floating island again and began to study the Tiangong Hundred Refining Techniques.

Although both Tiangong Bailianshu and Yimu Alchemy have the step of infusing spirits, they are completely different.

Because plants and trees have spirits, but spiritual materials are inanimate objects, so we need to find another way to give them spirits.

In the weapon refining shops in the city, in addition to selling spiritual materials, they also sell demon spirits, which are similar to the souls of humans.

The spiritual weapons are refined by using these demon spirits to imbue them with spirits. Of course, the demon spirits of plant and tree spirits can also be used.

The higher the level of the demon race, the stronger the demon spirit, and the more spiritual the spiritual energy and even the spiritual treasures refined will be. This is completely proportional.

Of course, the spirit of my own ancient mirror is a special existence and cannot be formed by this ordinary method.

Even the wisest man can make mistakes. When Chen Yunhao was in the city, he really didn't think of buying some monsters.

But it is useless on the floating island, everything can be changed as you wish.

Chen Yunhao started from the lowest level, which is the first level demon spirit.

The refining of spiritual weapons requires extremely high levels of material refinement, so this is what the "hundred refinements" mentioned in the Tiangong Bailianshu means.

Ordinary weapon refining techniques only refine the materials once, while spiritual weapons must be refined at least three times. If it is at the spiritual treasure level, it will take more than a hundred times.

This refining process is the most time-consuming. Only by removing as much useless impurities as possible from the spiritual material can the demon spirit be able to maximize its compatibility with the spiritual weapon.

At present, Chen Yunhao can refine it twice, which is already very impressive in the Tianyuan Realm.

However, if you want to become a qualified fourth-level weapon refiner, refining three times is just the beginning.

In this way, Chen Yunhao stayed on the floating island for six hundred days, which is two months in the outside world.

The cultivator named Jin, whose name is Jin Yinan, sends invitation letters to all the cultivators in the refining stage of the entire Bibo Mountain every two months.