In the past ten years, Wang Bin has not focused all his energy on having children.

He has also made rapid progress on the path of cultivating immortals. Now he has successfully cultivated to the ninth level of foundation building, and the strength of his physical body is almost reaching perfection. This is the result of his hard work day after day.

However, he was still a little bit behind in cultivating his spiritual consciousness. Fortunately, after many tests, he finally mastered the secret technique of spiritual consciousness: mental piercing.

According to the theory that Wang Bin figured out himself, cultivation in the foundation-building stage is actually quite easy as long as there are enough cultivation resources.

Take the cultivation of spiritual energy for example. If you feel that the speed of spiritual energy accumulation is too slow, there are various resources on the market that can help speed up the cultivation process.

As long as you have enough spirit stones, even if you encounter a bottleneck during cultivation, you can buy pills specifically used to break through the bottleneck to help you.

Let’s talk about the practice of this body-refining technique. Actually, it is not too difficult. The core is to constantly strengthen your body and pay attention to practicing both internally and externally.

Specifically, it means practicing mental skills while using external force to beat the body.

There is a lightning protection formation to help provide support, and there is also a specially formulated body-refining medicine that can repair the damage suffered during body refining at any time.

Although a lot of resources are consumed during body refining, fortunately these resources can be purchased in the shops in Xihai City.

If you only have the prescription, that would be troublesome. You would have to look for the herbs everywhere and wait until you have finally gathered all the herbs on the prescription.

You also have to find an alchemist to help prepare the medicine. The key is that the alchemist has a certain success rate when making medicine. After all this trouble, it may take twenty years just to find all the herbs.

I heard from Du Juan that after reaching the Golden Core Realm, some things are difficult to buy even if you have money.

When Wang Bin heard this, he could only sigh helplessly, thinking that he would not worry about it for now and would deal with it after he reached the Jindan realm.

Maybe it's because Dujuan is only at the Foundation Establishment stage now, with limited status and authority, so he finds it difficult to buy.

The most troublesome part of Wang Bin's cultivation is his spiritual consciousness.

The progress of practicing the Star Visualization Technique has always been slow and regular.

I can only take two pills of the Nourishing Spirit Pill every year. If I take more, it will not work. I don’t know if it’s because of drug resistance or if my sea of ​​consciousness can only absorb so much.

Moreover, the sea of ​​consciousness is too fragile, and Wang Bin dare not practice it as freely as he did when he was refining his body.

After all, if the body is injured, taking some medicine can make it heal quickly, but if the sea of ​​consciousness is injured, it will be a big trouble.

If it is mild, it may just be a slight damage to the consciousness. If it is serious, it may cause memory confusion, unconsciousness, and even life-threatening.

However, Wang Bin estimated that according to the current speed of cultivation, in another ten years, his spiritual consciousness should be able to reach the perfection of foundation building.

During these ten years, Wang Bin also did a lot of other things.

He made good use of the two foundation-building training rooms, producing two drops of spiritual fluid every day. He now had several thousand drops of spiritual fluid accumulated.

Only a little over a hundred drops of these spiritual liquids were used by the women in their own family for cultivation, and the remaining hundred drops were given to Du Xiaoyue, who was asked to take them to Xihai City to exchange for some other cultivation resources.

Wang Bin saved all the remaining spiritual liquid.

The family’s consumption of cultivation resources is not that great now, and he had previously obtained two storage bags for the Blue Flame Birds.

The cultivation resources inside are simply not enough for him who is currently in the foundation-building stage, so there is no need to sell the spiritual liquid.

Of the more than one hundred drops of spiritual liquid that were taken out, half were used by Dujuan. Dujuan has now reached the late stage of foundation building, and she is practicing three exercises at the same time, so the consumption is naturally great.

However, Du Juan has provided a lot of help to the family over the years, especially in preparing various materials needed for the women in the family to practice refining weapons and forming formations. She took care of everything.

I was also learning about equipment refining and formations while doing experiments.

He combined the knowledge he gained from his previous life with the knowledge of refining equipment and formations he learned in the world of immortal cultivation, and some particularly novel and bold ideas often popped up in his mind.

During these ten years, he relied on his previous life's understanding of solar energy and his study of formations and weapon refining to create a first-order composite formation, which he named the Solar Energy Conversion Formation.

This solar energy conversion array can absorb the sun's heat, and then use this heat to replace spirit stones to drive the normal operation of the first-level spirit gathering array.

The function of the first-level spirit gathering array is to absorb the spiritual energy in the surrounding air and gather it into the array.

In order for the Spirit Gathering Array to function, it must either be built on a Spirit Vein and driven by the Spiritual Energy in the Spirit Vein;

Otherwise, you have to place spirit stones in the base of the formation and use the spiritual energy in the spirit stones to make the formation move.

But the solar energy conversion array invented by Wang Bin is different. It can replace the role of spirit stones to drive the operation of the array.

Although a first-order spirit gathering array only needs nine low-grade spirit stones as the array base, which seems to be a small number, for those cultivators in the early stage of Qi Refining, these nine low-grade spirit stones are not a small number.

Wang Bin carefully studied and analyzed this first-order solar energy conversion array. The more he thought about it, the more powerful it seemed to him. It was simply an existence that defied the heavens.

Although it is only a first-level formation, it breaks the restrictions of spiritual veins and spiritual stones on cultivation. This alone is incredible.

You should know that in the entire world of immortal cultivation, the number of Qi-refining cultivators is the largest, more than the number of all other cultivators combined.

If this first-order solar energy conversion array can be promoted throughout the entire world of immortal cultivation, then in the future, it will be much easier for cultivators in the Qi Refining stage to practice, and the number of foundation-building cultivators will at least double.

The number of Jindan cultivators will definitely double as well.

In this way, the strength of the entire cultivation world will be greatly enhanced.

However, there is still a key problem with this solar energy conversion array that has not been solved, that is, it can only operate normally when there is sunlight during the day. At night, when there is no sunlight, it cannot work.

Although there are many stars in the sky at night, the heat emitted by the stars is not enough to make the spirit gathering array work.

So strictly speaking, this solar energy conversion array is only half successful at present.

But I quickly figured out a solution, which was to invent something similar to a "battery".

How does it work? Place a few mirrors around the solar energy conversion array to reflect sunlight onto the array.

In this way, the solar energy conversion array can absorb more sunlight and generate more heat.

In addition to ensuring the normal operation of the spirit gathering array, the excess heat can also be converted into electrical energy and stored in a special "battery" inside the array base.

When the sun is out at night, this "battery" will automatically release the electricity and then drive the spirit gathering array to continue running.

As for the fact that it sometimes rains or is cloudy in the world of immortal cultivation, this is not a big problem for cultivators.

All they have to do is cast a spell to blow away the clouds in the sky so that the solar energy conversion array can continue to absorb sunlight.

In this way, the problem of the sustainability of the solar energy conversion array's operation was almost solved, and the long-standing restrictions on cultivation of immortals by spiritual veins and spiritual stones were broken through at once.

Although the structure of this "battery" is quite complicated, Wang Bin knew its general principle in his previous life, so although it is a bit difficult to make it in the world of immortal cultivation, it is not completely clueless.

Even if you can't find standard materials for making batteries in the world of immortal cultivation for the time being, you can try finding something else to use as a substitute.

According to the thinking of the world of immortal cultivation, the goal is to refine something that can store energy and release the energy when needed. Now, as long as we can make a magical "battery" that meets the requirements, it would be perfect.

Moreover, this solar energy conversion array has a wide range of uses. No matter what array is to be run, its energy source is basically one of two situations. Either it relies on the spiritual energy in the spiritual vein as energy, or it places spiritual stones in the array base to provide energy.

Now, as long as we add a solar energy conversion array outside these formations, we can replace the functions of spirit veins and spirit stones.

Although this solar energy conversion array is only a first-order array and can only be combined well with first-order arrays at present, in principle, it is also possible to combine it with second-order and third-order arrays.

It’s just that Wang Bin’s current formation level is still relatively low, and he can’t achieve such a high-level combination for the time being, but their principles are indeed similar.

Although this "battery"-like magical tool cannot be used directly for cultivators to practice like spirit stones, it can replace the functions of spirit stones in many other aspects.

Moreover, after creating this "battery"-like magical device, its energy can be obtained in many ways.

We can use natural energy sources such as solar energy, wind energy, and hydropower to store energy. In a sense, these energy sources are infinite energy.

However, Wang Bin also knew in his heart that this was a subversive invention for the world of immortal cultivation.

He can't let others know about it now. After all, with his current strength, he can't guarantee that he can keep it from being coveted by others.

So he could only use it secretly. Now, if he dared to spread this solar energy conversion array, he would surely die.

The first ones to try to kill him might be the Sihai Merchant Alliance and the families in Xihai City that control the spiritual veins.

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