A miracle at the beginning

"Woo-chiu!"

Xiao Kong called out sweetly. Needless to say, he would definitely drag Fei Ya to the swimming pool.

At night, the warm-up channel was still carried out as usual. Luo Yu led the team to pass the level without encountering any resistance.

In the room where the golden egg was smashed, Fang Yumeng chuckled and said, "Well, you have the best luck, so you should do it."

Luo Yu took the lead and smashed the hammer under everyone's expectant eyes.

"Bang!"

The golden egg cracked and a scroll appeared.

[Team Shared Technology Scroll: Thermal Air Defense Technology]

"Huh!"

Fang Yumeng said in surprise, "This is the technology of the air defense tower!"

Elina looked at the scroll, then looked at Luo Yu, and sighed, "You two humans... are both very lucky."

Everyone showed joy in their eyes, and Luo Yu was overjoyed!

He had wanted to build an air defense tower for a long time, but there was no scroll. He didn't expect that this time the golden egg actually produced a scroll!

Luo Yu smiled and said, "We won't sell this scroll. I'll use it now."

"Yeah!"

No one had any objections. Although the auction was about to start, this kind of precious shared technology must not be sold.

Click to use, and everyone received a prompt to unlock the technology.

Everyone went home. Luo Yu soaked in the bathtub, gently pinched Xiao Jin's tiger tail beside him, and smiled: "Go get me a glass of juice."

"Oh!"

Xiao Jin was about to get up, and suddenly remembered something and said: "Master, are your brewed wines ready to drink?"

"I want to taste it."

Luo Yu said with a smile: "If you didn't say it, I almost forgot. I will take out the wine tomorrow."

"Go, get me the juice."

Xiao Jin nodded with a smile, and Luo Yu was studying the technology that had just been unlocked.

This thermal air defense technology tree has many buildings. The cheaper ones are thermal javelin launch towers, thermal anti-aircraft arrow launch towers, and the advanced ones are thermal beam anti-aircraft bombardment cannons, etc.

The functions of javelins and arrows are similar to those of arrow towers, so they are unnecessary.

The light column bombardment cannon is too expensive, even more expensive than the electric shock tower.

After studying for a while, Luo Yu finally decided to build a [thermal condensation bomb anti-aircraft defense tower].

This thermal anti-aircraft tower does not need to consume wood as raw materials, but uses thermal energy to condense fist-sized thermal bombs to bombard the sky.

The attack power is 10 points, which means that it can kill creatures with a physical fitness below 10 points in one second. The power is not great, but the firing rate is good.

It fires once per second, and the air range is 2 kilometers.

The range of 2 kilometers basically exceeds the limit of the airship's ascent. The most important thing is that the cost is cheap.

[Thermal condensation bomb anti-aircraft defense tower: fireproof stone bricks * 500, iron ore * 500, copper ore * 5000, silver * 5000]

This cost is very cheap compared to the electric shock tower, even compared to the arrow tower.

Of course, cheapness naturally has many disadvantages, such as consuming 10 thermal energy for each launch, which consumes a lot of energy.

It can only attack the air, not the ground.

In addition, this is a building, not furniture, and cannot be critically hit.

If Luo Yu had not obtained 10 heat collection plates before, he might not be willing to build this thing.

"Let's build it tomorrow!"

Luo Yu thought so in his heart, took a shower and went to bed.

After breakfast in the morning, Luo Yu walked to the east of the territory. The first thing he built was not an air defense tower, but a strike array.

After several reinforcements, the area of ​​the territory has expanded a lot. The original strike array can no longer be close to the air wall, so it needs to be built again.

This is simple. Reduce the original entrance space, build a death corridor, and then two walls to circle the new entrance.

Luo Yu is already familiar with this job.

Of course, this is not enough. Arrow towers need to be added on both sides of the new death corridor.

At present, there are 170,000 wood and 320,000 stone bricks in the territory, and it's done!

After a series of operations, the strike array was perfect again, and because of the addition of a corridor and two arrow towers, the defense will only be stronger than before!

Luo Yu opened the construction page and began to build a condensed bomb air defense tower.

The enemies coming from the sky are not like the land with only one intersection. The entire air wall in the east is almost their attack range.

The defense in the east is about 7.5 kilometers horizontally, and the coverage radius of an air defense tower is 2 kilometers, which means that two air defense towers can basically cover the airspace in the east.

The firepower of two towers alone is definitely not enough. Luo Yu decided to arrange the air defense towers in the way of architecture and ladder configuration segmented blocking.

At the extreme range of 2 kilometers from the air wall in the east, a row of four air defense towers are arranged to ensure that the opponent's air force will be hit by firepower once it enters the airspace.

If the opponent wants to destroy his air defense tower, he needs to advance to the range of the arrows.

It is equivalent to being beaten all the way in vain.

This is much better than building it directly next to the air wall.

The second echelon of air defense towers can be built directly on the walls of the base, which are about 3 kilometers away from the first echelon of air defense towers. Once the enemy's air force approaches the base, the air defense towers on the base walls and the first echelon of air defense towers can form a crossfire, causing continuous attacks on the enemy's air force.

This is the architectural air defense echelon conceived by Luo Yu.

In other words, at this stage, building eight air defense towers, plus electric shock towers and so many arrow towers, should be able to make the enemy's air force return empty-handed.

Moreover, it is also good to build the first-tier air defense tower in the wild. If the enemy breaks through the strike formation, they will be attracted by the air defense tower during the impact and then demolish it.

This can slow down the charge of some enemies.

In the case of 5 electric shock towers firing a round of salvos every 5 seconds, as long as they can hinder the enemy for half a minute, they can kill dozens of the enemy's attacking units.

As soon as he thought of it, Luo Yu began to build air defense towers according to his own ideas.

On the grassland, a flash of light appeared in front of Luo Yu.

This air defense tower is only one meter high, made of stone, and looks like a small stone radar. The bowl-shaped center store is where the thermal energy condensation bomb is launched.

It took a while for Luo Yu to build all eight air defense towers. The next step is to connect the energy pipeline.

There is enough copper ore at present, so it's done after it is built.

However, eight air defense towers consume 80 thermal energy for a round of salvos, one shot per second, and 4800 thermal energy per minute.

In other words, even a fully stocked thermal energy storage tank can only support about 10 minutes.

In addition, the release of the arrow tower also consumes thermal energy, so one thermal energy storage tank is definitely not enough, and another one needs to be built.

Not only the thermal energy storage tank, it is best to build another lightning energy storage station.