Yang Wei's words made everyone realize that even if they had enough keys, they still needed to unlock the stone ball in order to obtain the combined attack formation inside the stone ball.

"This kind of formation stone ball is very profound, and it is particularly critical in the order and position of the key placement, once it goes wrong, it will lead to the combined attack formation in the stone ball, the power will be reduced, and even part of the original function of the formation will be erased. But if ...... If the key is placed well, then the final combined attack formation will be more powerful on the basis of the original!"

Everyone suddenly understood that the placement of the key was the key.

"And what are you going to do with these keys?"

They looked at Yang Wei.

A secret key appeared in Yang Wei's hand, and he held it in his palm......

Airplanes!

He crushed the key in his hand and turned it into a purple mist, which melted into his eyes.

I saw that his eyes were filled with purple light, and he looked at the patterns on the walls around him, and opened his mouth to explain to everyone.

"These patterns on the wall are the specific placement methods, but they need to be understood, we look at them normally, and it is naturally difficult to understand, but every time we crush a key, we can obtain a certain degree of enlightenment. ”

As he spoke, Yang Wei took out another key and crushed it.

Chu Nan and the others also tried to take out the key and crush it, and as the purple mist blended in, they did feel the difference after looking at the patterns on the wall.

However, it takes a total of 210 keys to crack the stone ball, and they only have 90 extra keys here that can be crushed.

Fearing that the keys would not be enough, Buju and Miao Shi decided to go to the lower three floors to collect some more keys.

Chu Nan and Yang Wei stayed here to carry out pattern comprehension.

And just like that, they began to act.

With Buju and Miao She's current strength, it is not difficult to break through the levels of the lower three layers, especially the levels of the first and second layers, which are basically not difficult.

Even if they fail on the way, it doesn't matter, they can get as much as they can.

Chu Nan and Yang Wei stayed in the room, trying to comprehend, and once there was something they couldn't understand, they immediately crushed a secret key.

These patterns go from shallow to deep, and after crushing one or two keys at first, you can understand them, and as they gradually become more esoteric, even if you crush four or five key keys, you can only understand a rough idea.

Originally, they also thought of concentrating the key on one person, and one person would do the enlightenment.

It's just that Yang Wei told everyone that everyone can absorb different powers of enlightenment, some people may have reached their limit after absorbing twenty keys, and they can no longer absorb them, while some people can absorb more keys.

Just in case, it's safer for two people to go to enlightenment together.

In the blink of an eye, Chu Nan and Yang Wei had already smashed twenty secret keys one after another, and their eyes were filled with purple light, but fortunately, they had not reached their limit at present.

However, when they crushed the thirty secret keys, both Chu Nan and Yang Wei had a feeling that they were about to reach the limit.

It made a little bad rise in their hearts.

In fact, with the power of their current comprehension, they are still very far away from understanding all the patterns thoroughly, and they are basically just getting started......

Chu Nan knew that there was no way to go on like this, so he simply put his heart on the side, and a card directly appeared in his hand, which was a cultivation card!

This cultivation card is also the only remaining cultivation card in Chu Nan at present, and its purpose is ...... It's an enhancement of the perception effect!

For a while, as Chu Nan used this comprehension cultivation card, those patterns that could only be understood were instantly thorough!

Even with many patterns in the back, in Chu Nan's eyes, he is no longer ignorant, and he can understand it at a glance.

Chu Nan knew that the duration of the cultivation card was limited, so he immediately seized the time and quickly comprehended it.

Yang Wei had already reached his limit after crushing thirty-five secret keys, his heart was bitter, and the progress of his enlightenment was still too little.

However, when he looked at Chu Nan, his eyes suddenly widened, and he found that Chu Nan had realized that he was far away from him.

"This ...... How is this possible!"

Yang Wei's mind set off a huge wave.

He remembered that not long ago, Chu Nan and his progress in enlightenment were about the same, but now the two sides suddenly opened a huge distance.

His heart was extremely shocked, but he knew that he couldn't disturb Chu Nan at this time, so he watched silently.

Soon.

Buju and Miao Shi also returned.

They had a relatively smooth run through the first and second floors, but after entering the third floor, they began to struggle and finally managed to get more than twenty keys.

In addition to the remaining ones, there are still more than fifty keys that can be crushed.

In the case that Yang Wei has reached his own limit here, these more than fifty keys will be provided to Chu Nan.

Chu Nan crushed the key one after another in the process of continuous comprehension, originally his limit was about the same as Yang Wei, but after using the cultivation card, not only his ability to comprehend was greatly increased, but even the key that could be absorbed was also enhanced.

Now he had crushed forty keys here, and the power of enlightenment had reached a level comparable to crushing eighty keys under normal circumstances.

Chu Nan's eyes were full of purple light, and when the number of secret keys he crushed reached sixty, his enlightenment had reached the last moment.

The three of them were all nervous at this time, and they were even more excited and ecstatic.

Once Chu Nan comprehended all the patterns here, then the combined attack formation they had obtained this time would reach an extremely strong level.

In fact, in addition to their room, there will be two options for the rest of the rooms that can be exchanged for the combo formation.

One is to crack the formation stone ball in person like them, so as to have the opportunity to enhance the formation to a great extent on the original basis.

However, this method has certain risks and requires sufficient key support, and there are usually very few teams that choose this method.

The other is to directly exchange a fixed number of keys for a combo formation.

This is also the choice of most teams.

It's just that in this room that needs the most keys, unlike other rooms, there are two options, and you can only crack the formation stone ball yourself to obtain the combined attack formation.

And once you understand all the patterns in the room and crack them, then the combined attack formation obtained will also be in the true sense......

The strongest combo formation!

Even if someone gets enough keys in the future and comes here, as long as they don't comprehend all the patterns here, then the combined attack formation obtained by cracking the stone ball will not be the strongest.

Call!

Finally, with the promotion of the cultivation card, Chu Nan successfully comprehended all the patterns in the room.

After closing his eyes and sorting out the many information contained in the pattern, the moment he opened his eyes, he picked up the keys and methodically put them into the grooves on the stone ball.