After reaching the Nirvana Realm and the Immortal Realm, even if you have fought for thousands of years, you may not be able to upgrade to the next level.

And more importantly, although the spirit of contract can theoretically kill monsters to gain experience points, in fact, the experience points that can be obtained are different depending on the spirit of contract.

Killing the same monster, a contract spirit of the lowest quality, can only gain one experience point, while a high-quality one can gain hundreds, or even thousands.

That's how well monsters are utilized.

In addition, there is a compatibility between the spirit of the contract and its owner.

Those with a high degree of compatibility can even complement each other, so that each other's cultivation upgrades will be much improved.

When the level is high, the spirit of contract needs the assistance of its master if it wants to upgrade, and if the master is too scumbag and the gap between it and the spirit of contract is too big, then it will also affect the upgrade of the spirit of contract.

Due to the utilization of monsters, the different experience points obtained, and the different degrees of fit, the level of the spirit of the contract is also very different.

And if you want to cultivate this utilization rate, fit, and so on to the highest stage, then you naturally need a pure spirit body of extremely high quality.

Among them, the spiritual power contained in the pure spirit body is different, which determines the utilization rate of the pure spirit body for monsters, and also determines the acquisition of experience points.

A pure spirit body that only contains 100% energy is naturally better than a pure spirit body that contains 1,000 percent or 10,000 percent.

And this kind of pure spirit body containing high energy is not uncommon in this dark mountain range, if you look carefully, you can still find a lot.

Even the pure spirit body that contains ten times the spiritual power and a hundred times the spiritual power has a lot.

In addition to this factor, there is another important factor that determines the quality of a pure spirit body.

That's the fit with the owner.

The higher the fit, the greater the benefits for both parties.

There are many factors that determine this fit, but there is one thing that many people know.

That is, a pure spirit that has just been conceived, a blank space, without any personality bias, and without any memory, can cultivate the spirit of contract with the highest degree of compatibility with itself.

And this kind of contract spirit with a 100% fit can be refined into a real clone.

The rest of the contract spirits can only be called "alternative clones".

Although this alternative clone can be controlled by the master and has a powerful ability to connect consciousness, this spirit of contract belongs to another existence.

Normally, nothing happens to this spirit of contract, and it honors the master's commands.

But if something happens, then the spirit of the contract may betray and go independent.

Therefore, this kind of spirit of contract is called an alternative doppelganger, that is, an unsuccessful doppelganger.

And if it is a contract spirit refined from a blank newborn pure spirit body, then it is possible to become a true doppelganger.

Just like Zhou Yang's Lu Bu clone, this doppelganger and Zhou Yang's soul will are one, and the two can be said to be one person.

So there is no such thing as betrayal and non-betrayal.

How can a person betray himself?

This spirit of contract, which is refined from the newborn pure spirit body, naturally has the same ability.

And just like Zhou Yang's Lu Bu clone, this spirit of contract also has the ability to think independently, and can even make the consciousness of the two merge together, so that the consciousness of the two, the perception of heaven and earth, etc., are multiplied.

It can be said that this spirit of contract is another self.

This also means that he has mastered the ability to "fight monsters and upgrade".

Everyone knows very well that even if the external force is strong and against the sky, if you are not strong, then when this external force is lost due to some factor, then there is only one way waiting for you.

Therefore, everyone knows that only the power in their own hands is the most real and best.

And although this spirit of contract is powerful, it can only be the most trustworthy force if it truly becomes its own doppelganger.

It was also for this reason that Zhou Yang and the others hoped to obtain a newly born pure dark spirit.

However, it was clear that there seemed to be some kind of powerful prohibition in the dark mountain range, and when they searched in the mountain range, they did not even encounter a newly born pure dark spirit.

You know, before they could break the blockade of that space, in a very short period of time, they saw several newly born dark spirits.

But when he entered the depths of this dark mountain range, he saw nothing.

In this case, either some device in the mountains that facilitates the birth of new spirits is turned off, or the newly born spirits are channeled elsewhere.

Zhou Yang was naturally more inclined to the first possibility, after all, they hadn't seen the shadow of a newly born spirit during this time.

This made Zhou Yang and the others unwilling, but it was almost impossible to find the lord of the dark mountain range hidden in this huge dark mountain range.

"Alas" Zhou Yang sighed, and then he was still a little unwilling to open the eye of insight with all his strength, wanting to see everything in the entire mountain range.

He also wanted to take advantage of this last opportunity to find the last secret of this dark mountain range, and it would be best if he could find the device that controlled the entire mountain range here.

It's just a pity that they have been looking for more than half a month, but they don't have any clues, and now they want to find the secret hidden in this dark mountain range, and the difficulty is not ordinary.

So Zhou Yang finally sighed, and prepared to leave here with Li Xiuning, Cai Wenji, Gao Yue, Bai Suzhen, and Xiaoqing.

It's a bit of a shame that they didn't get the newly born Pure Dark Spirit, but there's no way they're going to stay here forever.

After all, there is still much to be done within the Humanitarian Alliance.

Without hesitation, they simply chose the direction where the Humanitarian Alliance was located and quickly swept over.

At their speed, they quickly left the range of this dark mountain range, and before leaving, Zhou Yang still turned his head a little unwilling to glance at this dark mountain range.

In the end, Zhou Yang didn't say anything, and turned around directly and chose to leave.

However, Zhou Yang and the others didn't notice that just when they left this dark mountain range, an incomparably pure dark power was condensed in the middle of this mountain range.