Chapter 990

The most difficult thing to dig a hole underground is how to judge the direction.

In reality, this is the biggest problem. In order to get through the mountain tunnel, both sides started at the same time. As a result, no one met anyone after digging for a long time.

To ensure accuracy, we need a lot of Surveying and mapping work and familiarity with topography and geomorphology.

Until entering the information age, human beings finally avoided that kind of Oolong with the help of computers. Later, after the emergence of shield machine, the error was very small, and the error unit was mm. Dare you believe it?

As for the magic world, of course, we can't use the scientific method.

Dwarves, underground dwarfs and rock halflings are called deep earth races. They are born with the ability to determine the direction underground. The error of the excavated cave is almost no worse than that of the shield machine. It's really awesome.

Mages also have a means to measure the soil landform of the target in great detail. It is called deep earth prophecy. This is a prophecy faction spell with grade B.

Of course, an Yi pointed out that they were just digging a tunnel more than 400 meters long and about 20 meters deep. There was no need for such a big movement. It was enough for apple tea to determine the direction.

Although he is only an ordinary halfling, not a rock halfling, with natural underground perception, he has a listening skill and can determine the approximate position through sound.

Of course, there are errors, and they are very large, but they are also enough.

After all, their goal is a military camp, not with another wave of tunnel diggers. As long as the general direction is right, don't dig too much or less.

So now apple tea sticks its ear to the wall of the cave and listens to the voice above. An Yizhi advances at a walking speed against the light ball of lightness, holding the map of mountains and rivers.

The soil in front of him wriggled like a living creature under the action of magic, separated left and right by a pair of invisible hands, close to both sides.

At this time, it's time for an to point to the "simple alchemy" under his feet.

Because the mechanism staff can save him the trouble of sketching the Dharma array, the practicability of the skills of the secret silver robe of simple alchemy began to rise.

The soil on both sides divided by the map of mountains and rivers will soon solidify and compress under the action of alchemy and become hard rock. In this way, it can not only avoid the trouble of transporting the excavated soil, but also strengthen the tunnel with it, so as not to bury them halfway

This is not uncommon.

If you listen to the NPC mage, you will know that every once in a while, you can always hear a rash mage wandering around the ground with Sol's stone walking technique. As a result, he lost his direction and trapped himself in the following example. He even saved digging and burying. It is estimated that he will become a fossil in thousands of years

An Yi pointed out that the method they used has been regarded as a means with high success rate and security, but I'm afraid only players dare to do so. It's very difficult to let dwarves do this work, especially when they have to act secretly and can't call more people and resources.

The danger of underground Jedi advance is far more than "collapse". Without any intelligence assistance, they know nothing about the underground geological structure. They are likely to dig and fall into underground cavities, or dig groundwater and so on, resulting in cave irrigation.

You know, not far from the military camp is the "Mirror Lake", which is not a small area. It's really no accident to dig out groundwater.

Fortunately, none of these shit happened. An Yizhi rarely had a European gas explosion. However, even without any emergencies and the combination of mountain and river country map + simple alchemy, it took them nearly an hour to dig to the scheduled place.

The speed of human excavation is not fast from a realistic point of view, but if it is not worried that the magic fluctuation may attract attention, an Yizhi can open such a long tunnel in a few minutes.

After all, you can't explain the magic world with science

"I heard neat footsteps. It should be the army. Yes, passers-by wouldn't have such neat footsteps."

Apple tea listened to the voice from the cave wall. An Yizhi also stopped digging. He opened the system list and saw that the game time above was more than 6:30 p.m. the neat footsteps might be sent by the soldiers who went to the canteen for dinner at the party. Even if you guessed wrong, hearing the sound of neat footsteps also means that they have entered the barracks, right below it.

Now there is another problem. They want to build an export.

Of course, it's not good to dig an exit casually. In case they show up in the middle of the canteen, they are surrounded by soldiers with rice bowls ready to eat. They see two guys emerging from the ground

——It must have been a particularly embarrassing scene.

An Yi pointed out that since he planned to do so, he was naturally a bit sure. He didn't like to take one step at a time, but preferred to plan the next few steps in advance before taking one step.

That is to say, plan and then move.

He felt out Mister's prophecy manuscript and whispered:

"Peep into the devil's eye"

The use effect of the peeping magic eye is not as good as that of the secret magic eye because the secret magic eye has the size of a fist and is too big. At most, the peeping magic eye is only the size of a glass ball and has better concealment.

Both have the ability of translucent and semi stealth. It is the most appropriate choice to use it to detect in advance.

The peeping magic eye rose slowly under the control of an Yizhi and plunged into the soil above.

Under the action of the map of mountains and rivers, peeping the magic eye through the soil layer is like passing through the liquid, without any obstruction.

An Yizhi and apple tea stared at the picture sent back by the magic eye until the soil disappeared, the deep night sky appeared on the picture, and an enlarged sole

Peeping at the devil's eye was stepped on

The soldier who stepped on it looked back in doubt. An Yizhi hurriedly asked the peeping magic eye to return to the ground. The latter saw only a shallow pit. The soldier didn't care much. He thought he stepped on the stone. The peeping magic eye didn't reappear until the soldiers in line walked away.

Thanks to the fact that the peeping magic eye is only the size of a glass ball, it can't be fooled by the secret magic eye with a big fist.

Let the peeping magic eye turn around. The picture shows that the place where it emerges is an alley in the military camp. Seeing that there are no passing soldiers around, the peeping magic eye quickly flies up, keeps a height of about one meter, and slowly flies forward against the wall.

This feeling is quite novel. It's a bit like controlling aerial drones to sneak in for investigation. Since an Yizhi hasn't played "demolition No. 6", it's a little rusty to operate.

However, he is a bit gifted. Using the translucent characteristics of shadow and peeping magic eyes, he can always find a hiding place, such as the dark place in the corner, among the weeds on the roadside, and so on.

The peeping magic eye goes up first. In addition to observing the exit, the more important task is to get the route.

Their goal is to grab a magic guide machine armour and run away. At least they should know where the hangar is. The military camp is not like a town. It is impossible for him to go in and visit casually.

Peeping out of the alley, the devil eye flew all the way along the wall. It passed a connected house. It looked like an officer's residence.

Even the officers of the imperial army can't live too luxurious in the barracks, but it's an imperial enjoyment compared with the soldiers' big bunk.

Apple tea pointed to the picture uploaded from the magic screen and said:

"Angie, wait."

"Ah?"

"Can you zoom in here?"

Apple tea refers to an officer who is about to push the door out, but it is a little far away and can't see clearly.

"There's no way. Peeping at the magic eye is not a secret eye. This thing has no zoom function."

An Yizhi said strangely:

"Did you find anything? I can try to get closer."

"No, No."

Apple tea shakes its head:

"Maybe I made a mistake. It has nothing to do with us. Just think I didn't say it."

The reaction of apple tea was inexplicable, but Ann didn't pay attention to it. Instead, she continued to control the peeping magic eye to fly forward.

Because of the fear that there is something like a border over the barracks, you should know that whether it is a secret magic eye or a peeping magic eye, this kind of investigation magic is not rare, and the army will certainly take precautions against it. If the peeping magic eye does not invade from the ground, but approaches from the sky in peace, 100% will be beaten down by the imperial army.

As a result, the peeping magic eye can't fly too high. It can only advance step by step along the road in the barracks. Otherwise, just raise the field of vision and find a building that can accommodate the magic guide armor.

That thing has a height of more than ten meters. Even if it is stored in a squatting or kneeling position, even if it is lying down, it still needs a lot of space.

Such a large building is really conspicuous and not difficult to find. He walked through the dormitory used by officers and continued to move forward. About ten minutes later, an Yizhi and apple tea saw a building connected like a warehouse through the magic eye. The more important evidence is that the warehouse is not only high, but also the exit doors are very huge, which is obviously not the size for human use.

But a little surprised, an Yizhi found the disabled officer in front of the warehouse

What's the name of the goods?

This is also a sad reminder. He was severely burned by an Yizhi and lost a lower leg and the whole left arm. As a result, he didn't even leave an impression of his name

He was talking to another man dressed like an officer. He looked and sounded like his subordinate.

Whether it's peeping magic eyes or secret magic eyes, they only have vision but no hearing. Ann doesn't know how to read lips. Otherwise, she can study what they say.

The magic eye hides in the shadow nearby. An Yizhi plans to let the peeping magic eye enter the hangar and make sure when they pass.

But just then, the disabled mage turned and looked in the direction of peeping at the magic eye!

Mages are very sensitive to the peeping of the line of sight, especially if the other party has more than level 40. This is not John's weak chicken and must be treated with caution.

An Yizhi turned the position of peeping at the magic eye and tried to avoid looking directly at it. The translucent peeping magic eye hid in the deepest darkness under the torch. It was almost impossible to find it with the naked eye unless he approached and touched it.

Fortunately, the other party just looked at the direction of peeping at the magic eye, then turned around and continued to charge in the doubt of his subordinates, and did not find peeping at the magic eye.

An Yizhi breathed a sigh of relief and waved to dissolve the peeping magic eye. Although he didn't enter the hangar to see and make sure, he has enough information now.