For Cheng Yu, setting up the Dayan inheritance training formation was already familiar, because he had already deployed this formation separately from the Immortal Demon Tower more than once.

However, this was the first time he set up the simplified version of the Dayan inheritance training formation, so he was still quite cautious.

Although the formation arranged by Cheng Yu is a simplified version, it is still so complex and profound for Chen Hongning and Chen Tianxing.

In fact, it can be said that although the essence of this formation is not very different from the original version, there are also many differences in details.

For the original version, the formation only requires regular replacement of spiritual crystals. Of course, although it is a permanent version, the formation itself actually has losses, but this loss is very small.

But the current simplified version is different. It consumes a lot of energy, so it also consumes a lot of spiritual crystals. In addition, this version of the formation itself also has many restrictions.

First, the number of people who can enter the formation at one time is limited. This formation can only withstand a maximum of twenty people at one time.

Second, as the number of uses increases, the formation itself ages faster. When it ages to a certain level, the formation can no longer be used.

This is also the biggest shortcoming of the simplified version.

However, this is exactly what Cheng Yu needs. If the formation he arranged for the Chen family is also permanent, wouldn't he be at a huge loss?

Moreover, when a person has no use value, then he has no existence value in the eyes of others.

Although the Chen family seems to be upright now, who knows that they will fall out when they get this formation? If he thinks that he is the only one in the world who can arrange this formation, and the Chen family has now obtained this formation.

If they kill themselves at this time, does it mean that from now on, only the Chen family will have such a magical formation in the world?

This is what Cheng Yu took into consideration, so this simplified version of the formation came out.

As long as they understand that their formation may be destroyed at any time, then they will not dare to mess around. At least before they fully understand the formation, they will never kill him.

But, can they study it?

Obviously it is impossible, because the real prototype of this formation is in the Immortal Demon Tower. Without the runes in the Immortal Demon Tower for them to explore, it is impossible for them to understand the reason.

Because the formation itself is compressed, this is also the highest achievement of Old Man Tianzhen’s research on formations. This is just like computer compressed files in the real world. Old Man Tianzhen compressed the formation into the runes in a special way.

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This formation was then released through a special decompression formation in the Immortal Demon Tower, and Cheng Yu directly took out the compressed file-style formation module together with the release formation.

In other words, the formations they saw were actually like a bunch of compressed files, and they could not see the essence of the formation at all. This also meant that if there were no runes to see the essence of these formations,

He will never be able to understand the principle of this formation.

The only thing they can understand clearly is the release formation, but this release formation is embedded in the entire compression training formation. Therefore, even if they can clearly understand that this is a normal formation,

But when it was done like this, it looked baffling and I couldn't understand it at all.

Therefore, Chen Hongning frowned tightly at this time. He felt that the method of this formation was too novel and profound. Based on his understanding of the formation, he did not understand what was going on at all.

As for Chen Tianxing, he couldn't understand it even more. He was just like a layman watching the fun! But when he saw Chen Hongning's expression, his heart sank. This shows that this formation is really profound. Even the ancestor can't see it.

It’s all so strenuous.

But how did he know that their ancestor of the Chen family not only struggled to see, but also completely failed to understand how Cheng Yu arranged this formation.

The most important thing is that what he is doing now is equivalent to a kind of aboveboard stealing. Even if he doesn't understand, it is impossible to ask Cheng Yu for advice, because such a request is too unreasonable.

Chen Tianxing originally planned that as long as Cheng Yu figured out the formation, he would ask the ancestors in the back mountain to study it carefully, and they would definitely be able to crack this mysterious formation.

But now seeing Chen Hongning's expression, he knew that it was not that easy to decipher this formation. Because he couldn't even understand it himself, and he didn't know how much his ancestor understood it.

Judging from the confused expression on the ancestor's face now, I'm afraid he didn't understand much of it.

For such a formation, it is actually very energy-consuming. Even if it has been modified by Cheng Yu, it still requires a lot of energy.

Unknowingly, Cheng Yu had stayed here for a day and a night, and it was not until the evening of the next day that he completed the arrangement of the formation.

Whoosh!

The moment Cheng Yu completed the formation, he felt that his body was drained instantly. Not everyone can do this job. If it were anyone else, he would have to rest for who knows how long.

It takes ten days and a half to set up this formation.

And because he has nine souls in his body, his mental power is many times stronger than that of ordinary people. In addition, there are dozens of spiritual veins in the Mountain and River Map, which also continuously replenishes his spiritual energy, which makes him unable to survive.

Arrange formations intermittently.

"How to use this formation?" When Chen Hongning saw that the formation was completed, he looked at the few grooves left in the formation and wondered.

"You guys can bring over a few suitable spiritual crystals, just about the same size as this groove!" Although Cheng Yu was very tired, but now that the formation has been laid out, he still had to teach them what should be taught first.

Otherwise, if he leaves first when the time comes, they will be in vain by muddle-headedly destroying this formation.

As for the spiritual crystals, he has plenty of them, but he will not engage in such a loss-making business. The formation has been laid out for them, do they still have to put the spiritual crystals into it themselves? This is not Cheng Yu's style.

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If he didn't earn some spiritual crystals from the Chen family, he would be worthy of them.

However, whether it is Chen Tianxing or Chen Hongning, their status in the Chen family is so high that they still have a few spiritual crystals.

Especially Chen Hongning, because he wanted to see the magical power of this formation immediately, so he took out six spiritual crystals without saying a word, five small and one large.

Cheng Yu took the spiritual crystal, embedded the five small pieces in the five directions of the formation, and placed the large spiritual crystal in the middle of the formation.
Chapter completed!