"This ......"

The three of them looked at each other.

Usually the teams that come here will start from the first floor.

After all, the first layer is the least difficult, although there are fewer keys, but at least you will go first to see the specific difficulty, and then consider whether to go to a higher layer.

Chu Nan said that he didn't want to waste time here, so he wanted to go directly to the second floor.

"Don't worry, we've been preparing for so long, no problem. ”

Chu Nan patted his chest, quite confident.

"Okay, listen to you!"

The three of them glanced at each other, and they didn't hesitate too much, they were all full of trust in Chu Nan.

Immediately, they came to the second floor of the castle.

This second floor is much more open than the first floor, and at the same time, on each room on the second floor, there are five key patterns, indicating that the room here can obtain five key patterns.

"It's still too little. ”

Chu Nan shook his head.

He had already learned earlier that even the worst combo formation required twenty keys to get it.

And if you want to change to a good combo formation, it is likely that hundreds of keys will be needed.

The number of keys here still made him feel unsatisfied.

"Let's go to the third floor!"

As soon as Chu Nan spoke, the three of them couldn't help but change their expressions slightly.

"This ...... Isn't that a bit hasty?"

Yang Wei couldn't help but say.

Although they were full of trust in Chu Nan, they still felt that they should be down-to-earth and take it step by step.

After all, they didn't know what was going on in these rooms yet.

If it's too difficult to pass, you won't die, but if you fail, you won't be able to enter these rooms.

"Don't worry, I'm sure!"

Chu Nan clapped his chest again, full of confidence.

And just like that, they came to the third layer......

"You can get ten keys in each room here, which is quite a lot!"

Miao Shi looked at Chu Nan.

I'm worried that Chu Nan still thinks there are few keys here.

"This ...... Why don't we go to the fourth floor? ”

Chu Nan thought about it and felt that he had come here, so he simply went to see how many keys there were on the fourth layer.

Miao Shi and the three of them smiled bitterly.

I feel that Chu Nan's heart is too big......

This castle has a total of five floors, except for the fifth layer in exchange for the combined attack formation, the fourth layer can be said to be the most difficult layer.

And now they haven't even been to a room, so they go directly to the fourth floor to challenge the highest difficulty......

It's crazy!

"Don't worry, I, Chu Nan, have always done things safely. ”

Chu Nan continued to pat his chest......

As the fourth floor of the highest difficulty, there are not many rooms here, there are only ten rooms in total.

However, the number of keys in each room has reached ...... Thirty pieces!

This couldn't help but shake their hearts.

Chu Nan's eyes were even brighter, and he felt that this was the most suitable place to wander.

"This is it!"

Chu Nan rubbed his hands and couldn't wait to go in.

"This ......"

They hesitated.

Although the number of keys here is extremely staggering, this is the most difficult layer after all, and the situation inside must be extremely dangerous.

Of all the teams that have always been here, none of them dared to rush directly to the fourth floor as soon as they came.

Even the team composed of those upper elites did not dare to be so crazy......

Even the vast majority of teams are basically working on the first and second floors.

There are very few people who have the ability to break through the fourth layer.

"Chu Nan, have you figured it out, if we fail, then we won't be able to go to other rooms, and we won't even be able to get a key this time......"

Bu Ju said with a serious face.

"Don't worry, my Chu Nan's biggest shortcoming is that he is calm, and I will never do such a thing as taking risks. ”

In order to show the sincerity of his words, Chu Nan slapped his chest harder this time.

This made the three of them smile bitterly.

Although they were very apprehensive in their hearts and felt that this kind of move was very radical, but this time the actions and plans were all arranged and planned by Chu Nan, out of trust in Chu Nan, they did not hesitate too much, and they took their respective war beasts and walked into the room on the fourth floor together.

The rooms here are huge, and when you look inside from the outside, it's pitch black, and you can't see anything, but when you step into them, the darkness in front of them quickly dissipates, and when the line of sight is clear, they are already in a strange world of ice and snow.

When they appeared here, whether it was themselves or the war beasts, a circle of formations appeared under their feet, and as they moved, the formations would also move.

This is the teleportation array.

In the event of a crisis while they are here, the teleportation array will automatically turn on to ensure their lives.

However, the moment the teleportation array is opened, it also means that they have failed to break through and will lose the qualification to continue to enter the room.

At this time, they were in an open plain of ice and snow, and hundreds of meters in front of them, there was a blue light curtain connecting the sky, which seemed to cut them off from the world in front of them.

When they came to the blue light curtain, through the blue light curtain, and saw the scene ahead, their hearts all set off a monstrous wave.

Beyond that curtain of light, above the plains of ice and snow......

There are countless snowballs, rolling all over the world!

Each of these snowballs is the size of a house, and there are extremely large numbers, dense, and powerful, as if the whole world in front of them is occupied by these countless snowballs.

The snowballs rolled up to the blue curtain of light before they melted into it and disappeared.

While seeing this scene, Chu Nan and their minds also understood what they were going to do here.

They will have three hours to prepare.

After three hours, they had to take the designated items, walk out of the blue light curtain, and deliver the designated items to the house one kilometer away.

In the process of transporting items, they need to dodge these snowballs, but if they touch them, they will pose a threat to their lives, and then the teleportation array will be activated, and the breakthrough will fail.

"Although there is a gap between these snowballs, whether it is the number or speed of these snowballs, it is impossible to dodge!"

Buju's face was pale and he muttered in a lost voice.

"And that's not all, you see, that's what we're shipping......"

Miao Shi pointed to the rear.

The item they were about to transport was a giant battle axe!

It's just that this giant battle axe is divided into multiple parts, and they need to transport one part each.

And any of these parts have a staggering weight.

Once they have these parts on board, their speed will suffer.

"And ...... The snow on this ground is not ordinary snow, and if you walk on it, your speed will slow down......"

Everything here is difficult.

They all felt hopeless in their hearts, and felt that it was impossible to send the goods to a kilometer away!