"All combat units, retreat in the direction of the No. 2 sub-base!" Zhang Feng gave the order.

There were more than 300 of them left, and they obeyed the order, immediately abandoned the enemy, and fled to the rear like a tide.

The giant centipedes were clearly unwilling to let go of these little bugs that had angered them, "Bang Bang!" screamed, chasing after them.

In the blink of an eye, more than 40 swift mechanical bugs were wiped out.

The corners of Zhang Feng's mouth twitched, this was a mistake in his command, the swift mechanical insects just now fled with all their might after receiving the order, and there was no resistance to fight back at all, if he ordered a part of the mechanical insects to be broken, the situation would be much better.

The 30 swift mechanical bugs turned back and fought back, while the others continued to retreat. ”

If you know your mistakes, you can change them, and you can do good.

That's it, chase all the way, run all the way. Whenever the giant centipede caught up, Zhang Feng ordered a part of the swift mechanical insects to break off and block them, buying time for the retreat of the large army.

At one point, the giant centipede felt hopeless and was ready to give up, and at this time, 30 swift mechanical insects stepped forward to provoke it, completely enraging the big guys.

After paying the price of a total of 90 swift mechanical bugs, the giant centipede was finally lured into the attack range of Subbase 2.

"Charge the cannon!"

The black, shiny, sleek shell of the sub-base immediately lifted a few window-like things, and ten cannon barrels stretched out.

As the charge progressed, the white light in the barrel flashed, getting brighter and brighter......

The giant centipede also seemed to sense the danger, and stopped attacking one after another, raised its upper body, bared its hideous teeth, and screamed.

"Charge complete, attack!"

"Zizi-"

Ten rays of white light shot out, right in the middle of the giant centipede.

"Bang! bang......" There was a soft sound, and the head of the insect was bursting. The indestructible shell of the giant centipede pierced through the cannon as if it were papier-mâché in front of the cannon's laser column.

Ten giant centipedes were exterminated.

"Bang!" the remaining twenty or so giant centipedes screamed, and the armor on their bodies kept moving, obviously terrified.

"The cannon continues to recharge!"

Zhang Feng soon discovered that one of the biggest drawbacks of the small cannon was that the speed of charging was too slow, and it took 3 seconds.

Compared to the speed of the giant centipede, three seconds was enough for them to attack countless times.

Sure enough, seeing that the barrels of the cannons began to shine again, the giant centipedes immediately pounced.

"Stop them!" Zhang Feng's brain had just generated this consciousness, and he heard a loud sound of "Bang!", but it was several third-level rapid mechanical insects that met and collided with the giant centipede, stopping the other party.

The third-level rapidity mechanical insect is more than three meters long, and its whole body is iron, not to mention it weighs more than ten or twenty tons, but in front of the giant centipede more than twenty meters long, it is simply like a toy.

In this delayed time, the second charge of the small cannon is completed!

"Zizizi-"

The white light shined, under the control of the base light brain, locked on the giant centipedes with great precision, directly hit their heads, and killed ten more.

At this moment, the remaining dozen or so giant centipedes were completely furious.

However, Zhang Feng was also prepared, and before they could attack, dozens of swift mechanical insects surged up and stopped them at any cost.

"Charge the cannon!"

"Charged! Ready to attack!"

"Didi - Since our combat units are engaged in melee with the enemy, if we kill the enemy directly, we will cause the loss of our combat units, and if we only wound the enemy, we can avoid the loss of our combat units. Please choose, master!" the mechanical voice suddenly reminded.

"Kill the enemy directly!" Zhang Feng did not hesitate. Trading the Swift Robot Bug for the Giant Centipede is definitely a good deal.

"Zizi-"

In the third wave of attacks, ten more giant centipedes were eliminated. Seven other speedy mechanical bugs were also destroyed by penetration, including a level 3 speedy mechanical bug.

At this time, the only three remaining giant centipedes suddenly exerted their strength, and one of them broke through the barrier of the rapid mechanical insect swarm and rushed to the front of the sub-base.

"Bang!" the giant centipede monster cried, sliding sideways, striking in tandem like a blade.

The black and shiny shell of the sub-base couldn't withstand its attack, and it was cut through countless openings.

Three giant centipedes more than 20 meters long were lying on the sub-base more than ten meters high, and from a distance, it looked like several centipedes were lying on the silver ball.

I saw that the giant centipedes opened their mouths, "Boom!", and the sub-base had been bitten off a large piece.

"Zizi-"

"Bang!" the small cannon continued to attack,

The giant centipede's huge body lay on the sub-base, just blocking the muzzle of the gun, and pierced two holes in the stomach, but because it was a non-vital part, it was not fatal.

"Bang!" the giant centipede screamed twice in pain.

The swift mechanical bugs took the opportunity to rush up, and with a ratio of hundreds to three, this was an absolute worm sea tactic.

The number of giant centipedes was small, and they couldn't take care of each other as they did at the beginning, and after a while, they were crawling all over their bodies by the rapid mechanical insects, especially when several rapid mechanical insects crawled into the holes penetrated by the small cannons and wreaked havoc in their bodies, which completely announced the end of the battle.

The giant centipede rolled on the ground in pain, and after a while it lost its movement. The swift mechanical bugs crawled out of their skulls and ran over with something like red crystal in their mouths.

"An intermediate-level energy source that can be installed on combat units, allowing them to evolve and no longer be limited by the level of the main base. The highest evolution level of an intermediate power source is fifteen. ”

The rest of the swift mechanical bugs rummaged through the corpses of the giant centipedes, and they all ran over with the same red crystals in their mouths.

35 giant centipedes, 35 intermediate energy sources.

After losing hundreds of swift mechanical insects in exchange for these mid-level energy sources, Zhang Feng didn't know if it was worth it.

"30% of the exterior of the No. 2 sub-base was damaged, and it took 1,000 units of energy and 10 hours to repair. Do you want to fix it?"

"Fix it immediately!" Zhang Feng sighed, 10 hours, how many combat units will be delayed!

Mechanical units that do not have a power source do not have the ability to devour evolution and need to be upgraded or installed by the base, while mechanical units that have a power source can devour and evolve autonomously without being limited to the base.

In other words, if these intermediate energy sources are given to the second- and third-level swift mechanical worms, there is no need to waste the production time of the base.

But after Zhang Feng thought about it for a while, he still decided to spend the production time of the base and install these intermediate energy sources on the body of the first-level speedy mechanical worm.

After all, with the production of the main base, there are more and more sub-bases, and the production rate of mechanical units will be higher and higher, but the number of energy sources is limited.

Let the combat unit with the primary energy source installed devour the intermediate energy source, I believe that even the person whose head is caught in the door will not do this.