Jingle bell~

After rushing out, he greeted Li He's "hidden weapon".

Crushed stones, small pieces of iron, and all kinds of small things with sharp edges and corners hit Li He with their heads and faces covered, like gusts of wind and rain, extremely dense, without stopping.

The godless giant sword was raised and placed on his face, blocking the only unprotected place.

These hidden weapons were all spit out from the mouth of the mechanical mouse, with great force, and a bowl-big pit appeared immediately when they hit the ground.

The giant sword changed its structure in Li He's hands, and after a period of deformation and reorganization, the sword body extended to its limit.

Five meters.

The five-meter-long blade is comparable to a giant dragon spear used for siege.

The huge length of the sword became extremely light in Li He's hands, and after several consecutive horizontal cuts, the world was finally quiet.

The parts shattered all over the place can barely distinguish the claws and tail of the mechanical mouse.

He clicked, the blade was retracted, and finally fixed to a length of more than two meters. Li He slid the sword on the ground and picked up a rat's tail.

"The mice here are obviously bigger than the ones outside." The mechanical pioneer, who was very familiar with any machinery, discovered the key to the problem when Li He was still puzzled.

He collected the parts he picked up on the ground, and finally put together a complete mechanical mouse.

"Well, it really is."

Li He nodded. The mouse here is a lap bigger than the outside. The specific data from Xiao Luo is:

Type 2 mechanical mouse (variation)

Body size is 30% larger than type 1.

The power is 50% higher than that of Type 1.

Agility is unchanged.

The newly added spitting ability is somewhat threatening.

According to the order of seeing, Xiao Luo named two types of mechanical mice of different sizes, type 1 and type 1.

Li He stretched his wings from behind, illuminating a large area with astigmatism.

Digging all the way along the path of the mouse hole, it has unknowingly entered the depths of the underground drainage system.

Here is a huge space with a height of more than 100 meters and a space of more than 10,000 cubic meters. There are many thick pipes at the bottom of this space, and square water injection ports on the top.

If the map is correct, this is the reservoir of the underground drainage system.

Although mechanical lifeforms do not need drinking water, the demand for industrial water is very large, not to mention that Zuanxing’s mechanical civilization is another civilization that has developed industry to the extreme.

The huge water demand has led them to build huge reservoirs in the underground drainage system of the Holy City, which can store a large amount of rainwater when it rains, and then pump it to the ground through pipes and disperse it into various places where water is needed.

The pipe at the bottom is undoubtedly used for pumping water.

But now it has become a common channel for mice.

"It would be terrible if they followed the pipeline from the ground to the ground."

The mechanical pioneer said worriedly.

"That will happen sooner or later."

Li He opened a pipe with a sword, and the rat hiding in the water pipeline was suddenly exposed. Li He was scared and ran around.

Li He helplessly counseled his shoulders. It seemed that the city patrol was about to launch a city-wide rat-infestation activity in the near future.

"Why so many mice!"

There are many rats, very many.

The pipe cut by Lee Hyuk was like a water pipe that suddenly opened the gate, and the rats inside spouted out like water.

Countless mice crowded together, and the densely packed numbers seemed to make the scalp numb. These mice piled up into a mouse ball, which squeaked in the reservoir and rolled in one direction.

There is a huge hole there.

Li He endured the nausea and cut open the rolling mouse ball with a cold face, but he didn't expect that this action would disgust everyone else, including himself.

The heavy sword slashed fiercely, and the sphere composed of mice burst immediately.

So the mice running around immediately buried the three of them...

It's sour and refreshing, it's hard to imagine.

After a while, the three people who crawled out of the pile of mice all looked up and down with a bad face.

Li He took out a dead mouse from the collar, and the mechanical girl suddenly flickered with electric light. The short-circuit effect made her shell heat up quickly, and after a while, it turned red like a cooked crab.

However, after the mice on the girl suffered hits and high temperature burns, they smoked and fell.

"Master, you shouldn't have done it."

"Ahem, I didn't expect this to happen."

"Hiccup~"

"You really shouldn't make a move."

The Pioneer of the Machine unearthed a mouse from his mouth, still stomping on the ground into broken parts and said.

The three of them glanced at each other, prepared their weapons one after another, and entered the hole where there are still scattered rats running in.

It was pitch black inside, the only light source was behind Li He, and the mice on the ground made nowhere to go. Finally, as soon as the three of them gritted their teeth, they stepped on the mice to move forward.

Anyway, it was a mechanical civilization, not a biological life form. At most two parts were trampled to death, and there was no blood or internal organs. The nausea was immediately reduced by several percentage points.

Li He asked: "How many reservoirs are there in the underground drainage system?"

"a lot of."

I haven't counted the exact number of mechanical pioneers, but he vaguely remembered that the rainfall in the holy city was very high at the time. Of course, the reservoir of this system will not be less.

"A total of two hundred and fifty-two."

The mechanical girl gave an accurate answer.

How many mice do you have to raise?

The three of them were terrified of thinking.

"No." The Mechanical Pioneer suddenly shook his head.

"As a maintenance tool for the underground drainage system, mechanical mice were indeed produced at that time, and there was a production line for mechanical mice in the drainage system.

But in the hundreds of years without rain, these production lines should have been closed long ago. No one will waste materials on this."

"But judging from the number we have seen so far, the production line of mechanical mice does not look like it is closed." Li He shook his head.

"Who opened it?"

"Look at it in the past and you'll know." Li He inserted the Godless Sword behind his back and said.

"Master, there is a production line two kilometers ahead."

"Lead the way."

"Yes, master."

Xiao Luo marked a route from the map and uploaded it to Li He's consciousness.

The more you move forward, the more rats there will be. In order to move forward quickly and kill more efficiently, the five-meter-long sword once again appeared in Li He's hands.

In another reservoir, every time the great sword swings the sword, hundreds of mechanical rats are cut into useless parts.

Finally arrived at the production workshop.

Sure enough, the door of this production workshop was opened, and the iron chain that had locked the door was damaged in an improper way, and the iron chain was cut neatly.

The production line installed in the workshop is operating at full power, using the mountain of raw materials on the side to produce individual parts.