A miracle at the beginning

Beside him, Xiaodie and Xiaokong have woken up and are getting dressed. Xiaojin ran out every three hours last night to set up the burning pit. Now she is still sleeping, so I won't disturb her!

After breakfast in the morning, Luo Yu looked at the situation of the thermal energy storage box. It reached the level of 18000/50000 overnight. Not bad, it will be full in a few days.

Early in the morning, Luo Yu directly cut all the stones dug by the digging worms and the ground badgers last night. With the inventory from the whole day yesterday, there are now 100,000 stone bricks. You can consider starting the plan in your mind!

Strike array!

Yes, the previous battle with the Fiery Twins gave Luo Yu inspiration. He wanted to build a strike array to completely eliminate the enemy from the east at the entrance!

The design of the strike array is complicated, but Luo Yu already has a detailed blueprint in his mind.

He walked to the edge of the territory in the east, looking at the fog in front and the looming air wall, Luo Yu determined the direction.

Every attack comes from this position!

All attacking units or neutral units enter from this area in front of him, and Luo Yu has basically calculated that the intersection hidden in the fog should be about five meters wide.

And the strike array is to be built from here.

First, Luo Yu has to build a corridor so that the attacking units must enter the strike array along the corridor he built.

As for the walls on both sides of this corridor, Luo Yu chose to make a mechanical wall.

This is an advanced wall that appears after unlocking the city wall technology. Its hardness depends on the material. The reason why it is called a mechanical wall is that it can hide terrible things such as automatic traps in the wall.

Just like the tight fireproof floor tiles can bury spikes underground, the mechanical wall can do the same!

This is the wall that Luo Yu fell in love with at first sight.

[Mechanical wall (each section): stone 200, iron ore 20, silver 20, gold*2]

Each section of the mechanical wall is 5 meters high, 1 meter long, and half a meter wide, so the cost is very expensive, and even gold is used.

Luo Yu started to build the first section of the wall close to the air wall, and the two walls were 6 meters apart and began to extend.

The distance was 6 meters, close to the air wall, which ensured that all the units coming in would be in the wall at the first time.

The two walls extended a little, and immediately turned at a right angle after five meters and began to extend to the left.

The reason why it suddenly turned instead of leading to the position in a straight line was because Luo Yu wanted the opponent to stay in the corridor as long as possible, so that the mechanisms on both sides could kill more enemies.

At the same time, turning and turning can also make more reasonable use of space. There is only one principle, the longer the enemy stays in their strike formation, the higher their mortality rate.

The corridor extended 60 meters to the left, and suddenly another corner extended to the right. This time, it extended 120 meters to the right.

If the entrance is the center point, then turning 60 meters to the left and then turning 120 meters to the right can balance the left and right. In this way, the total length of the strike formation is 126 meters, which is also better.

Why the number 126?

Because Luo Yu will build arrow towers and automatic crossbows on both sides of the corridor, both on the left and right sides. The number 120 meters is the coverage of the arrow towers and automatic crossbows. When the enemy enters the corridor, no matter which end they are at, they will be attacked by arrows from both sides, which is difficult to defend.

A corridor with a straight entrance, then turns left for 60 meters, and then turns right for 120 meters, and the first section of the strike array corridor is laid out.

Total cost: 25,200 stone bricks, 2,520 iron ore and silver, 126 gold.

Other things are fine, but the consumption of stone bricks is really high.

Luo Yu plans to build three sections of such a serpentine corridor. After having the template of the first section, the next two sections will be easy and will be built quickly.

The total cost of stone bricks is 76,000, iron ore and silver is 7,600, and gold is 380.

The first ring of the strike array that Luo Yu expected has been built.

The second ring is naturally to prevent attackers or other units from climbing over the wall from above.

Luo Yu spent iron ore to buy a large number of iron spikes and installed them on the top of the mechanical wall.

These iron spikes are so dense that there is no space for handholding or footstepping. If you really have the courage to climb over one, you will definitely be disabled.

Only those who can fly or have super agility and can jump five or six meters high can jump out.

If there is really such a method, Luo Yu can only do it himself.

The construction of iron spikes consumed a lot of iron ore for Luo Yu, but he has saved a lot of iron ore these days, which is enough.

The third step is the arrow tower.

There must be an arrow tower at each corner, a total of 6 corners, which means 6 towers are needed.

[Automatic attack arrow tower (3000 pieces): wood * 30000, iron ore * 5000, silver * 2500]

It takes 180,000 wood and 30,000 iron ore to build six arrow towers. There is indeed a stock of iron ore, but Luo Yu is not willing to use up all the stock. Anyway, the price of iron ore on the market is not fluctuating, so just buy all of it.

18W wood, currently at a price of 1:2.5, is 45W.

3W iron ore can be bought with 6W silver, plus the 15,000 silver consumed by six arrow towers, a total of 52.5W silver.

Currently the base has 252.6W silver, and it cost a fraction of that.

Money really allows you to do whatever you want.

Click on the auction house to buy, buy, buy. Before a burst of buying, all kinds of materials in front of him piled up like a mountain. Luo Yu directly clicked to build. In just a moment, six arrow towers stood outside the wall.

The range of the six arrow towers almost covered the entire corridor, but Luo Yu knew that this was not a killer.

After all, the enemy entered the corridor, and there were walls on both sides of the corridor. It would be good if the rain of arrows could hit half of the time.

Luo Yu’s real killer was to build a firepower-intensive strike formation at the exit of the corridor!

It was also the real core of this formation!

This would require the use of the 38 automatic crossbows built before.

In order to defend the south, Luo Yu spent a lot of money to build 38 automatic crossbows. He traded 4 with others, and there were 34 left, which could all be placed on the firepower formation.

Put them on both sides. If an enemy came out of the corridor, he would be shot by 34 crossbows. I’m afraid he would be shot into a sieve on the spot.

The corridor is so narrow that not too many people can rush out at once, which means that every person who comes out will die.

However, the layout should be done carefully.

Luo Yu started to build the wall again, but this time it was not a mechanical wall, but a much cheaper high-end wall.