Han Fei had seen a square plant maze before. It is the shape of a wall of plants, which can be moved, can be ambushed and killed, and people can turn around inside and find no exit.

If you use the plant wall as a formation line, and use the spirit gathering array to supplement the aura, you will be banned from above. This became the deep-sea stone forest where the stone turtles were imprisoned in the second-class fishing grounds, but it was not easy to manufacture.

As for the extradimensional killing array, it is a bit difficult, but it seems that it is not difficult to make a Rubik's Cube.

I'll have to make a big Rubik's cube and use it as a library. In this way, inside each block, a chain of kills is laid out. Turn the Rubik's Cube from time to time to ensure that nothing goes wrong.

However, this Rubik's Cube does not seem to be simple. It's not a trouble to build, it's a trouble to form. With his current formation level, the power of the killing formation he made may not be enough, and at most he can block the realm of the law enforcer.

"Forget it, you can only get it out first, and then slowly upgrade and strengthen it later. ”

Han Fei said to himself.

As for the rest, the canteen and dormitory or something, it's good to install it directly in the back mountain, as before, living in a tree. As for the training ground for teaching students, it can be arranged in the maze.

Thinking about it like this, Han Fei suddenly felt perfect. Now, not only has the problem of school construction been solved, but it can also train students, and there is no need to build so many houses, which is great.

Flattening the ground all the way, Han Fei had already flown into the sky, flying head-down, and was studying how to arrange the formation.

I only heard the musician shouting, "What are you doing?"

Han Fei said impatiently: "You are busy with yours, I am engaged in construction." ”

Li Luoluo followed Luo Xiaobai and the others, who were turning over the ground, muttering: "I think he is just lazy." ”

Luo Xiaobai shook his head: "No." Although Han Fei is not distracted when he speaks, he is still very reliable in doing things. ”

Liluoluo grinned, looked at Han Fei, and beckoned: "I want to build one, your small villa with a hanging waterfall." ”

Han Fei waved his hand and said, "What do you think? The Mob Academy does not provide dormitories. Later, you go to the woods and build it yourself!"

I saw Han Fei holding the fish skin diagram in his hand and pondering it repeatedly.

"No, you have to be able to move...... No, it's too troublesome to move, so you can use a teleportation array instead...... Well, in addition to the killing array, you also have to get a defensive array to protect the plant wall...... Forget it, throw it all in......"

Half a day, in a flash.

In the evening, a group of people sat in the back mountain and were eating hot pot.

Han Fei was holding the fish skin diagram in his hand, still studying it. Now, in general, cooking is a pleasure to do.

After years of experience, although there is still some gap between this fat man and Han Fei, he has mastered the basic dishes and the taste is not bad.

When eating, you have to eat well, so that you can have a taste. ”

Zhang Xuanyu leaned his head: "What are the bells and whistles in your paintings?"

Han Fei pushed his head away and said, "I want to build a school that is different from the seven major sects." Now I have found out, why are there so many ruins and secret realms in this world...... It's all researched by people!"

Everyone: "???"

Including Luo Xiaobai, they were all confused: Building a house, why is it related to ruins and secret realms?

......

Day 3.

Everything has been taken care of. The wood and stones collected by Zhang Xuanyu and the musicians have all been piled up into a hill.

At this moment, everyone squatted on a piece of wood and watched Han Fei standing in front of the pile of wood and stones. They all want to see, what does Han Fei want to get out?

Suddenly, Han Fei took out a large piece of wood from the refining heaven and earth.

Luo Xiaobai's eyes immediately shrank: "Ten thousand years of red shirts?"

Zhang Xuanyu's eyes widened: "What! Didn't you say it disappeared?"

Le Ren muttered wildly: "I don't think it's gone, but it was uprooted by Han Fei." According to his character, he did this. ”

Li Luoluo looked confused: "So, this is a third-level fishing ground, the tree in the center of the sea grassland?"

The old man of the dry water also saw this scene with great interest. Although, the current 10,000-year-old red shirt is not worth much to Han Fei and them. But no matter how valuable it is, you have to see, how big is this material, isn't it?

"Whoa!"

I saw a huge amount of spiritual spring gushing out, which ignited in an instant, and the spiritual fire soared to a high level.

Han Fei suddenly came like this, which directly startled everyone and stunned everyone.

Even the old man was stunned, and only after a while did he say, "Young Master Han Fei...... This is refining weapons, right?"

Everyone was stunned, and the corners of Luo Xiaobai's mouth twitched: "This...... What's the big deal?"

Zhang Xuanyu muttered and swallowed his saliva: "Crazy, how many spiritual springs do you need here?"

The little dried fish that was crazy forgot to stuff it into his mouth, and he said with a confused face: "Aren't you building a house?"

In the stunned eyes of everyone, a huge red ball slowly appeared. It has to be 50 meters in diameter. This is the diameter of the 10,000-year-old red shirt itself, and now it has been pulled out by Han Fei.

It's just that after the ball came out, gradually, the ball began to deform.

Up and down, left and right front and back of the ball, some sticks came out. Then, it is deformed again and becomes a complex circular screw shape.

In fact, Han Fei didn't really go deep into refining, mainly because there was no need for that.

It's just a normal Rubik's cube internals. As long as the outer frame is constructed, it becomes a fourth-order Rubik's cube.

At first, Han Fei felt that the third-order Rubik's Cube was too simple, and the fifth-order was too troublesome, so he made a fourth-order out.

Unfortunately, the internals themselves are only 50 meters in diameter. Therefore, the whole Rubik's Cube is only about 80 meters long.

In the confusion of everyone, Han Fei began to refine stones. This, it's almost too much. Add a little bit of leftovers from the big red shirt, and its quality is not bad, just enough to meet the level of mortal weapons.

Of course, if Han Fei is willing, it can be better. Moreover, the real spiritual weapon needs to go through the entire refining process, and the cost is too high.

More than two hours later, 56 pieces of strange parts with different shapes appeared. All parts have 1 or 2 or even 3 square faces. Because the fourth-order Rubik's cube has a total of 8 corner blocks, 24 side blocks and 24 center blocks. That's why everyone was confused.

I only heard Han Fei shouting: "Xiaobai, Liluoluo, come to help." ”

Luo Xiaobai and Liluoluo walked over with a confused expression.

I saw Han Fei divide 56 pieces into several piles, write colors, and say: "Come, color these faces, you can't make a mistake." One kind of ground, there are six colors: orange, red, yellow, white, blue, and green. ”

Liluo frowned, grinning, "This is the house you are talking about?"

Han Fei said: "Look down on me, don't you? ”

Le Renmad and Zhang Xuanyu sat on the wood, eating dried fish while watching Han Fei and them do things with bells and whistles.

In the end, it's up to them to paint the squares in a colorful way.

When everything is done, Han Fei will refine the weapon again......

Finally, a square hexahedron is presented in front of everyone.

Zhang Xuanyu finally couldn't help but say, "No, what is this?"

Han Fei grinned: "Rubik's Cube." ”

If it's just a Rubik's Cube, then this can't constitute a real dimensional killing array. Otherwise, it should be a whole 64 pieces, and there are no internal parts.

It's not that it can't be refined, but the cost is too high. There is no internal connection, and the final solution is to refine this thing into a giant spirit weapon, which is to drain all the spiritual energy on his body, which is not enough.

However, Han Fei didn't need this to be a giant spirit weapon, as long as it was a mortal weapon.

Han Fei looked at the huge six-colored cube with satisfaction, and suddenly grinned: "Get up!"

Suddenly, everyone saw the big Rubik's Cube fly up, flying to a height of more than 30 meters, and then stopped.

Dry Water was puzzled: "Young Master Han Fei, are you adding a floating stone to this block?"

Han Fei immediately grinned and said, "You have a good eye. ”

Ku Shui smiled faintly: What kind of vision is this? There is no floating stone, you are not a spirit refining weapon, and it can't fly!

Musician: "Is this a house?"

Zhang Xuanyu grinned and said, "How can a house look like this?"

But Liluoluo likes it quite a lot: "No...... I think it's pretty good. ”

Luo Xiaobai didn't speak, she couldn't understand it, and for the first time, she felt that her IQ was not enough.

Han Fei smiled and said, "It's good-looking, right? ”

But seeing Han Fei's thoughts, the entire Rubik's Cube "clicked" and spun. After a few turns, the original beautiful six-sided complete color completely dispersed.

"Shhh

"Fog grass!"

"What is this?"

"Can it still turn?"

And Luo Xiaobai's face changed greatly: "Han Fei, how can you turn back?"

The old man who fell into the water shrank his eyes, took a breath and said, "Ingenuity, isn't this an infinite change?"

Han Fei smiled: "Not yet, there is no formation set up here." Once I've put all the formations in, this thing will automatically rotate. When the time comes, even I don't know what formation I will encounter when I go in?

The crowd was silent.

After a long time, the musician said wildly: "Then how do we get in in the end?"

Han Fei said with a smile: "Don't panic, when my formation is finished, I will join the self-destruction formation when the time comes." At that time, if someone tries to force it open, he will not get anything. This is the library building of our school, and you must put the six colors together in one color, and none of them can be wrong before you can enter. ”

Zhang Xuanyu said leisurely: "This thing, how do you fight?"

I saw Han Fei's heart move: "It's ...... like this"

I saw that the Rubik's Cube Library began to rotate, and I don't know how many times it clicked. Including Luo Xiaobai, they have all been stunned, and the Rubik's Cube has slowly recovered as before.

Zhang Xuanyu gasped: "Just ...... I saw it click, and I didn't understand any of it. ”

Le Ren scratched his head wildly: "It's over, I guess I won't be able to enter the library in my life." ”

Liluoluo stiffened his face: "I think it's better to build a house normally." ”