"This fortress is pretty strong. When the resources are in place, I will set up forts at all the most critical landing points on the coast as the first layer of defense to block the Sea Clan's attack!" Jia Zhengjin looked back and said, "Although the effect may be limited, it can also play a small role. ”

"If we can have enough fortresses, it will still be beneficial to the battle!" said King Simai of the Kabastian Empire excitedly, "If the news is not too sudden, we will definitely build a fortress before the battle to defend against the Sea Clan." It's just that it's too late! Lord Keane can directly summon such a majestic and strong fortress, as long as the most important landing point on the coast is blocked, the defense force can be strengthened immediately!"

"That's right!" Arthur stepped forward, "but I'm a little curious, Lord Keane needs to summon a relative amount of materials and minerals to summon such a giant structure, so it should be a special space magic similar to the principles of alchemy?"

"It should be super alchemy!" Piros said excitedly, "Even a ninth-order top alchemist, I'm afraid he can't refine a fortress like Lord Kean!"

"It's a bit similar in theory," Jia Zhengjin turned on the flickering mode, "This can be regarded as a new type of magic that I created myself!Let's move on to the second type of defense, everyone be quiet, please come with me to the top of the fortress!"

After they all followed him to the fortress, Jia Zhengjin turned around again, selected the arrow tower in the building mode, and placed it casually on the side of the fortress's city wall.

Seeing the arrow tower suddenly rising from the ground, everyone showed puzzled expressions.

"Lord Keane, what is this?" Yates, the king of the Leitman Empire, looked at the tower curiously, feeling a little confused. Because this kind of system architecture does not exist in this other world.

"I know people must be curious!" Jia Zhengjin said, "but to show this building, you need to have a specific goal." Please all step back!"

The crowd obediently retreated to the side, leaving a space around the tower.

Jia Zhengjin glanced back and nodded with satisfaction. At the same time, he took out the spider warhammer from the virtual backpack and quickly summoned a giant spider: "Look! Suppose this spider is the enemy of the Sea Clan, when it tries to attack, this will happen!"

As he spoke, he ordered the giant spiders to attack the Arrow Tower.

"Hiss——!!" The giant spider quickly pounced, roaring and attacking.

"Whoosh!" the arrow tower immediately turned color, and an arrow shot out, piercing the spider's body.

Of course, the attack power of the Arrow Tower at level 1 is actually not high. Therefore, its arrows do average damage to spiders.

Jia Zhengjin immediately asked the spider to stop attacking, and didn't care that the arrow tower continued to shoot, turned his head and said: "You see, right? This is a fully automatic induction arrow tower, when an enemy approaches, or someone takes the initiative to attack it, it will immediately counterattack! I am going to build a dense arrow tower along this side as a second line of defense against the sea tribe! Let's also play a tower defense game." ”

"But Lord Keane," King Zandra of the Chakman Empire said worriedly, looking at the giant spider that had not died under the attack of the arrow tower, "This thing is good, but it doesn't seem to be very powerful?

What he meant was that this spider had been shot for so long, and who would be a sea clan stronger than it would pay attention to the attack of such an arrow tower? I'm afraid they wouldn't even be able to break their magic shields, right?

Not only him, but everyone on the scene, including the tens of millions of soldiers of the entire Human Empire Alliance, also had the same idea.

"Don't worry, Jia Zhengjin expected it, and immediately stretched out his hand and pointed at the arrow tower, "This is just a demonstration! The most basic arrow tower is indeed lacking in attack, so we need to upgrade it first!"

"Upgrade?!" the crowd stared at him intently.

Jia Zhengjin nodded, then took out a hammer, and began to clange at the arrow tower.

The shape of the tower is constantly changing, and the attack style is slowly increasing from the simplest arrow to the more powerful attack.

By the time he reached the fifth level, he had already killed the giant spider.

After reaching the tenth level of the Arrow Tower, Jia Zhengjin put away his hammer and summoned a giant spider again: "Okay! Now let's continue to do the test! As you can see, our Arrow Tower is now the highest level. Try it and see how powerful it is!"

Everyone stared nervously at the tower, holding their breath and not daring to make a sound.

In fact, even if it is upgraded to the full level, I am afraid that the vast majority of the human empire coalition can easily dismantle it.

The threat of the Arrow Tower comes entirely from its attacks.

If the tower attacks softly, then the damage to the Sea Clan is quite limited even if it is spread all over the coast. But if an arrow tower has a super attack, and all of them are the same arrow towers, it is quite powerful! Even if the enemy can easily destroy an arrow tower, but in the face of overwhelming terrorist attacks, even if they want to break through this line of defense, they will inevitably suffer heavy losses!

So everyone watched nervously, hoping that the Arrow Tower would have the power they were expecting.

Jia Zhengjin gave the order again and let the giant spider attack the arrow tower.

However, this time, the giant spider did not get close, but only had the idea of attacking the arrow tower, and with a "sudden" sound, the arrow tower quickly shot a powerful giant crossbow arrow, directly penetrating the body of the giant spider, killing it instantly.

"Hiss~~" Seeing this scene, everyone showed shocked expressions. This kind of power is already quite terrifying! If you really set up dense arrow towers on the coast, it will definitely be a nightmare for the Sea Clan, and it can greatly reduce the opponent's strength in battle.

Of course, everyone was very excited. Because of this second layer of defense, the hope of defeating the Sea Clan has become one point greater.

Jia Zhengjin was very satisfied with the expressions of everyone in front of him: "How is it? This second layer of defense is quite satisfying, right?"

"It's amazing!" "Simai excitedly came to the front of the arrow tower, looking up at this powerful building, "If you can really fill it here, you can definitely make the sea clan come and go!"

"This will have a huge effect on our ability to contain the Sea Clan soldiers!" Arthur also came over and said, "Lord Kean, after this battle, can you please come to our Cangyan Empire's capital and summon some of these magical buildings?"

"I'll talk about this later!" Although it is a source of money, Jia Zhengjin still has to focus on dealing with the sea god now.

"Yes!" Arthur nodded, a smile on his face. Jia Zhengjin did not categorically refuse, which shows that this matter is negotiable. Building a large number of towers in the capital will effectively prevent any hostile or opposing Assassins from entering the city to assassinate them. As a royal family, especially a king, this kind of thing is actually quite common.