On the mountain wall, a huge array emerged, reflecting a blue shimmer and looming. Pen Fun Pavilion www.biquge.info between the old builder's eyebrows, there was also a faint blue fire that couldn't stop jumping and swaying.

What's even more amazing is that the stones, wood, sand and steel and other materials piled up on the ground on the side of the cliff are rapidly disappearing at a speed visible to the naked eye, as if they have been swallowed up by this mountain wall.

If the old master knew that Lin Luo could see the flickering of the entire formation at this time, he would probably be surprised. Although he deliberately chose to start building in the middle of the night, in fact, ordinary people could not see the appearance of this construction array.

This spectacle lasted for about two hours before it completely stopped, the formation on the mountain wall no longer flowed, and gradually stabilized, and the stones piled up at the bottom of the cliff had completely disappeared.

At this time, the old master seemed to stop breathing, and his heart only beat once in a few minutes.

Everything seems to be calm and normal.

However, Lin Luo clearly felt that the mountain wall under his feet had not stopped, and there was a certain vitality slowly nurturing in it.

Half a month has passed.

The old builder was still sitting cross-legged on the edge of the cliff, and had not moved for more than half a minute since that night. Lin Luo erected a simple grass hut around the old builder to shelter him from the wind and rain.

After seeing the miracle that night, Lin Luo didn't dare to despise the construction technique, and respectfully guarded the old master day and night.

On the edge of the cliff, a three-story tower has grown from the mountain wall.

That's right, it's grown.

There was no gap between the base of the tower and the stone wall, and it followed the trend of the mountain wall, as if there were already such stones there, but they looked like a square tower-like building.

However, at night, the tower rises several inches in height at a rate visible to the naked eye, as if some invisible craftsman is quietly working hard in the night. But Lin Luo could feel that this was the old master who was constantly driving the formation construction.

A month later, a stone tower was standing on the edge of the cliff, and the body of the tower fit perfectly into the original steep mountain wall, as if a craftsman had carved out the original stone of the mountain wall.

However, every time Lin Luo looked at it from a distance, he couldn't help but want to laugh, the shape of this tower and the mountain wall looked really indecent, as if the mountain wall suddenly vibrate.

The appearance of the tower is very simple, like a stout obelisk, and the tower even has a mysterious pattern with a special shape, faintly exuding a simple deterrent.

There are many lookout holes around the tower, which can also be used by sergeants to shoot arrows. On the wall of a tower attached to the edge of the cliff, there is a heavy stone door, which can be opened by twisting the machine.

Looking at this towering magical building, a word suddenly appeared in Lin Luo's mind: 3D printed architecture.

"It's finally done. The old builder, who had been sitting on the edge of the cliff for more than a month, suddenly exhaled a long breath deeply, as if a stone statue had come to life.

"Master!" Lin Luo bowed in front of the old master, excited.

The old builder opened his eyes and looked at the towering obelisk arrow tower in front of him, nodded to Lin Luo with a calm face, and said, "Very good! Boy, the results of your calculations this time are not only accurate, but also increase the magnitude of accuracy. Not only has the construction time been cut in half, but the grade and power of this arrow tower have also been slightly improved. ”

Lin Luo sighed sincerely: "What is my contribution, what the master has shown is a miracle! This building technique is really amazing!"

The old builder nodded and smiled: "Where can my little skill of carving insects be called a miracle, but the building technique is indeed magical." Boy, do you want to learn?"

Lin Luo was overjoyed and said: "Of course I want to learn!

The old master said: "Okay, when this is over, I will give you a chance, whether you can understand it or not, but it depends on your own creation." Now that the tower has been completed, you should go and tell the officials of the city office that in three days, you will accept and hand over the seal here. ”

The old builder stood by the tower with his eyes closed, as if he had settled down.

Lin Luo waited on the side, waiting for the personnel of the border city defenders to come to accept the arrow tower.

It was only a mile away from the castle in the border city, and the two of them had been waiting for two or three quarters of an hour, and Lin Luo felt that his legs and feet were a little sore.

After another half an hour, a team of people came.

The first person was dressed in a black suit, but he didn't wear armor, and he smiled from afar: "Forgive the sins, forgive the sins!" I've wanted to visit the master for a long time, but I've been entangled in military affairs!"

This person is about forty years old, with a short beard, although he is a military general, but he is not like the captain Chen Ji next to him, he is not born like the captain Chen Ji next to him, he has a bit of a scribe's bearing, he wears a military attache hat, and a gold waist card is hung on the jade belt around his waist, which is the defender of this city, Zhou Renguang, a first-class martial arts general.

Although Zhou Renguang said forgiveness, he didn't feel the slightest guilt that made Lin Luo and the others wait for a long time.

The old master is just a strange man hired by the imperial court, and he has no official position or military establishment, and Zhou Renguang's attitude towards him can be regarded as giving him some face.

The old master smiled very calmly and said: "I am very uneasy in my heart when I am tired of the general coming in person! Lin Luo also bowed and saluted on the side, on this occasion, naturally he did not have the right to speak.

Zhou Renguang looked at the arrow tower and sighed: "The master is a true god! With the strength of one person, such a magnificent tower can be built in just a few months! If there are a few masters and gods in our army, wouldn't this city defense be impregnable?"

"General, please!" The old master led the way, and Zhou Renguang led everyone into the arrow tower.

As the stone steps swirled upward, they reached the observation room at the top of the tower, where it was still very loose for ten people to stand, and there were several one-foot-square window openings on all sides.

Half a person below the window opening, there is a row of handle-shaped machine brackets.

The old master introduced: "After opening the bracket, there is no need for people to control it, dozens of arrows can be excited in each direction of the southeast, northwest and northwest, and the arrows are not closed, the arrows are not stopped, and the arrow rain pours down, and I am not divided between the enemy and the enemy, please pay attention to the general." ”

Zhou Renguang was amazed, and the accompanying Lieutenant Chen Ji, as well as other lieutenants and strategists, were also amazed. Only an old strategist had a flat face, and he threw out a sentence in a low voice: "It's exquisite, but in front of the beast tide, it's better than nothing." ”

Zhou Renguang glanced at him and shouted, "Teacher Nian, don't be rude." But there was not much reproach in his tone. The counselor, who was called Teacher Nian, bowed down and said no more.

Lin Luo on the side was a little unhappy when he heard this, after the arrow tower was built, he followed the old builder up and down, and under the guidance of the old builder, he learned all the operation methods of the machine.

The tower is divided into several tiers, and not only can it shoot arrows, but if enough materials are provided, it can also spray stray fire, drop poison fog canisters, and roll down boulders. Several mechanisms work together to withstand the onslaught of small armies.

What amazed Lin Luo the most was that the mechanisms in these towers were not installed by any skilled craftsmen entering the towers, they were all generated by the old builder's construction skills in the process of building the arrow tower!

If you don't understand the mysteries of the art of building, it's hard to imagine it.

After everyone enjoyed the game for a while, another strategist beside Zhou Renguang asked, "Master, I don't know how to operate these machines? When the master leaves here, there must be a sergeant to guard this arrow tower?"

The old master pointed to Lin Luo on the side and said: "This son is called Lin Luo, he was originally a soldier in your army, I see him as smart and clever, and he has been borrowing to fight by my side for several months." In order to build this tower, he has made a lot of efforts, and I have taught him all the operation and operation of this tower and the methods of daily maintenance. The general assigns the tower guards to hand him over. ”

Zhou Renguang said curiously: "Oh? There are all such characters in our army, can you enter the master's eyes? I don't know which battalion of sergeants it is?"

Captain Chen Ji on the side whispered in his ear: "It's from the hard labor camp." ”