After the first plane shuttle was dispatched, the base entered the normal process and worked hard to accumulate the second batch of goods at a rate of producing about 60 energy cores per day.

He Kai said hello, sat on the soft and comfortable office chair, and on the control screen, Lu Wei clicked on the Resource Loyalty and Scientific Research Center.

――

【Resource Center】

Energy core: 503

Common resources: 50897

Special Resources: 8104

Towers: 48/48

――

【Research Center】

Machine gun turret level 3 (buildable)

Level 3 laser tower (buildable)

Cannon turret level 3 (buildable)

Level 3 long-range turret (buildable)

Level 2 Flame Tower (buildable)

Secondary Control Tower (buildable)

2nd stage missile tower (buildable)

Shock Tower (buildable)

Level 2 Magnetic Storm Tower (developed in 27 hours)

――

The number of towers in the resource center cannot be increased, but the resources are accumulated and increased every day, forming a reserve.

During this period, the scientific research center has successively developed a three-stage laser, a three-stage long-range artillery and a two-stage missile tower, and the power of the tower array has been significantly improved.

The orange laser shot by the third-level laser tower can heat the monster in 1 second, forming a deadly penetration, and the third-level laser tower has also upgraded the "Penetrating Shield" ability, for some lower-level shield monsters, the third-level laser tower can kill them! Although it is not very effective against elite-level shield monsters, it is not the same as a second-level laser tower.

The three-level long-range turret is extremely powerful, it can shoot a super-hot fireball with a diameter of three meters at a monster horde, and the core temperature reaches 3000 degrees! There are almost no monsters that can withstand this kind of heat, and with the flame sputter generated by the impact of a high-heat fireball, monsters within eight meters will be caught in a sea of fire, and after the successful development of this tower, few monsters can run half the distance.

The second-stage missile tower can shoot two missiles at the same time, with fast speed, high precision, great power, and the range can cover the entire defense platform.

As for the second-level magnetic storm tower in the research and development state, the power is estimated to be less than Lu Wei's expectations, so he wants to wait for the magnetic storm tower to rise to the state of the red tower, and then use it to deal with the boss with a thick protective shield, such as the world master, the effect should be better.

"Wei, today's test is here again, there are about 3,000 monsters gathered at the gate of the base, and I also saw our old friend, the snail that took away the six energy cores of the base."

"The snail, it's here again today?"

Lu Wei's eyes shrank, he was very familiar with the cunning snail, the first time it relied on the firepower of the defense platform to get three energy cores, and the second time it followed behind a world master, but the world master was killed, but it successfully left the base with three energy cores.

Now, judging from the monitor, the size of this snail is larger, the body has changed from cyan to reddish-brown, the armor is thick, and the protective shield is thicker...... After obtaining the six energy cores, it has evolved significantly.

Looking at the snail walking back and forth leisurely, it seems that he is determined to succeed in today's action.

"Kai, after opening the gate, don't attack it yet, wait for it to reach the middle of the defensive platform, all the cannons that can hit it will fire at the same time, I don't believe that a dozen third-level cannon turrets can't kill it!"

"Understood!"

After the total destruction of the flying monsters, the gate of the base opens.

Monsters swarmed in.

The tower formation of the defense platform, Lu Wei, has been adjusted, and after the secondary flame tower at the entrance of the passage has been removed, a control tower has been built that can make invisible monsters visible, which has played a good auxiliary role in guiding and detecting targets for cannon and long-range artillery towers.

After the monster enters.

Rush rush ~~~

Boom boom boom ~~~

Large-caliber projectiles erupting from muzzle fireballs, super-hot fireballs falling from the sky, metallic storms of machine-gun towers...... In the sea of fire, the lives of monsters are harvested in pieces.

The cunning snail found that after a while, the temperature in this base seemed to have risen a lot, and it opened its protective shield to block all thermal attacks, but it was not afraid of the heat waves around it.

When the snail reached the middle, he suddenly found that something was wrong, but it was too late, and a faint starting gun sounded, and more than a dozen guns around it were aimed at its three-level cannon turrets, all of which fired at the same time, and in the deafening noise, sixty or seventy high-speed shells flew towards it.

In this group of shells, there are conventional shells with average power, as well as armor-piercing shells with thin heads, especially high-explosive shells, which will explode violently after collision, causing the protective shield to burst into circles.

Bouncing bouncing!

The shield was violently deformed, and it almost collapsed instantly.

The snail didn't feel good, and he didn't want to take the energy core, so he turned around and ran to the exit!

But how can it escape? Under the three rounds of shelling and the continuous bombardment of high-heat fireballs, the protective shield of the snail finally could not withstand such a violent blow, and the protective shield collapsed.

"Whew~!"

The snail let out a scream, and a super-hot fireball fell directly on its head, and the 3000-degree heat instantly burned a part of its body into red carbon, but it didn't die immediately, with the fire all over its body, running wildly, dodging in a hurry to escape from the base, and a cannon suddenly fired! The armor-piercing bullet pierced its armor, and the next high-explosive shell exploded upon impact, blowing the snail to pieces.

"Good!"

Lu Wei shouted excitedly, he finally killed this snail, and the revenge of the six energy cores being taken away was finally avenged!

Pu Songling said in "Wolf": "How deceitful are the beasts? stop smiling", this snail is nothing more than that, no matter how cunning it is, it was not killed by Lu Wei's little strategy?

The existence of greed, no matter how cunning the monster, also has its fatal weakness.

The gate of the base is closed, and the energy core is not lost.

"Wei, I have good news for you, the resource library has more than 50,000 ordinary resources and more than 8,000 special resources, and we can upgrade the underground resource collector! After the Resource Collector is upgraded, the radius of collecting resources can be tripled, and the amount of resources that can be collected will be greatly increased! Even some special resources buried underground can be collected. ”

"Wei, do you agree to upgrade the Resource Collector right away?" Kay asked.

"Upgrade now, the sooner the better!"

“OK！ The upgrade process has been initiated, and the upgrade is completed after about 96 hours, during which the energy consumption is high, and the production of energy cores is reduced by one-third. ”

The development of the base is a gradual process, and the threat of monsters has temporarily decreased, and the speed of the construction of the base must be increased to serve the efforts to increase the production of energy cores.

Upgrading the Resource Collector is a critical first step.