"It's getting harder and harder to bring students nowadays!" After sending away the two apprentices who had begun to learn to do things, and after dinner, a certain master of the fairy wind bone began to immerse his mind in the system, studying the newly acquired [modular casting] specialty.

After teaching Harry for so long, it finally paid off, and Wren felt a sense of relief from an old father.

Modular Casting is a very useful trick.

For Harry, he may still be stuck in a simple [copy & paste] style of spellcasting, which is not the same thing at all with Wren's system.

The system can be seen as Wren's auxiliary brain, as long as everything is designed and the time comes to inject elements, it will be done.

After all, as a science and engineering dog, he is still majoring in architecture, and Wren has construction technology that surpasses the whole world in this regard!

Autocad architectural drawings appeared in Wren's mind almost out of thin air and were then entered into the system.

Hey!

Everyone is a module, and my module is 100 million points bigger, isn't it too much?

Wren comes from the Celestial Empire, a country with the name of [Infrastructure Maniac]!

When the stonemasons of the Kaos continent were still building bridges brick by brick, our Great Celestial Empire was a 100-meter-long prefabricated bridge body directly hoisted onto the bridge piers with cranes and large construction machinery.

When people use a small pulley, China uses a 50-story high, the heaviest can lift a 20,000-ton giant wheel gantry crane.

That's the difference between imagination and insight.

The next morning, when Harry anxiously asked Wren to tell him about the super-magical specialty he had comprehended, a somewhat shameless master said in a calm tone.

"Harry, if you can understand this usage on your own, you must be recognized as a teacher."

"Is this super-magic specialty already there?" Harry asked cautiously. Not to mention Harry, Downs, who had followed him, pricked up his ears curiously.

"What we call innovation is based on the knowledge that has been summarized by our predecessors. It could be a real innovation, or it could be an undocumented path. There is nothing to be ashamed of in the face of [science]. As long as it works, it's a good way. ”

"That'...... What is a module? ”

Wren didn't explain directly, but took Harry to the blacksmith shop, which he hadn't been to for a long time, and pointed to a stone mold that could hold molten iron.

Of course, the two apprentices knew that the coils on Tesla's electric tower were made by pouring molten iron into the straight, shallow grooves in the stone.

All of a sudden, they both understood.

This is the simplest mod in the teacher's mouth!

"What about the complicated?" Harry was curious.

"Follow me!"

When they came to a clearing, the two senior brothers saw their master wave his hand, and the earth element reacted.

It was broad daylight, but they had the illusion that a blazing sun was rising from the depths of the earth, and the earth beneath their feet seemed to become transparent......

There was a rustle, and the earth shook beneath my feet.

This was not an illusion, and they saw that the ruins not far away were also trembling slightly, and the sand and small clods of earth on the ground jumped up one after another, as if forming a layer of fine waves.

The ruined wooden window frames creaked and creaked, and then a half-broken wooden frame finally shook off the metal binders, and the thing hit the ground with a ping-pong sound.

They were shocked, still trying to spread their senses.

They were surprised to find that Master had easily extracted the metal components of the earth, mostly using the so-called [magnet] physical principles.

As if a hundred rivers were flowing into the sea, countless metal particles of various sizes gathered together to form a metal net composed of countless prisms of the same size in front of them.

The metal nets form a standard cube with a length, width and height of 3 feet.

Every time a cube was formed, a large amount of earth elemental poured into the cube like grout under the manipulation of magic.

Immediately, cubes were stacked in front of them like stacked blocks.

In front of him, Wren was arched by the slowly rising cube beneath his feet, taller and taller, until he looked down on them.

The whole process took about half a minute, and the two brothers were surprised to see that they had been trapped in a square urn city in the standard sense.

The urn city is not too much, and it is only a hundred square meters at the bottom.

It's not that the three-story wall of the urn city can't be climbed, but this feeling of looking up at the master is no different from looking up at the mountain, which makes them instinctively afraid.

"Huh!?"

"Master, this is also a modular spellcast?"

The two looked around and had to admit that this was indeed a module.

If the soil is simply piled up, there is absolutely no such feeling of facing a cliff. Those prismatic mesh frames enveloped the soil, and these cubic mounds of earth became every cornerstone of this majestic urn city that rose from the ground.

The power of building the city overnight alone made Harry worship his master Wren so much that he admired him so much.

Downs was more excited: "Master, can I test the strength of this wall?" ”

"Yes."

As soon as he thought of it, Tang Si did not hesitate to open multiple spells, and in one moment, three [electromagnetic guns] bombarded the 'city wall' of Urn City.

"Bang Bang!" The masonry splashes sounded like a lot of noise.

When the smoke cleared, Downs was dumbfounded.

In the word of mouth among adventurers, the [electromagnetic gun] has long become the signature magic of the Downs. He knew the power of the Electromagnetic Gun best.

Unless it's a large magical beast, an existence about the same size as a human is basically a big blood hole with one shot.

Regardless of the thick skin of a bear goblin or the armor of a heavily armored knight, nothing can stop an electromagnetic gun.

However, it was such a powerful shot, and it was only a fist-sized depression in the wall.

"I don't believe it!"

Now that Downs, who has been promoted to the master level, is already qualified to play the [Electromagnetic Cannon].

After an exaggerated roar, Downs was surprised to see that just one of the clod cubes was blown away, and not much of that power could even be transmitted to the clod cubes in the back row.

Because of the staggered distribution of these cubes between the rows, the scattering of one cube did not cause the collapse of the walls of the urn city.

"Ahh......h

Seeing the apprentice's surprised appearance, Wren was quite satisfied.

This is the fortification construction gameplay that I learned from the US imperialists before the crossing. Using a large amount of mesh galvanized polypropylene sheets as sandbags, and using an excavator to help fill in a large amount of sand, the army could build a fortification in a very short time.

As long as this enhanced version of the sandbag is stacked thick enough, such as a three-layer pile, let alone explosion-proof, even the main gun of a modern tank cannot be pierced.

In the magical world of Kaos, of course, there are no mesh galvanized polypropylene sheets. Wren used magic to gather metal particles, and the mesh bag created out of thin air was no match for the strength of galvanized polypropylene sheets. But in any case, it is stronger than simply using sacks of sand.

Finally, Wren added to Harry, "Since you like to play with protective magic. So in the case of this kind of protection, even if you put a golem in the urn city and force the other party to fight with the golem, it can be done. ”

Harry's eyes lit up.

Unbeknownst to Wren, a turret and trap flow protection archmage was born from this moment.