It's been about two hours on the march, and I've cleaned up several dens along the way, and the amount of bioenergy captured is not a small amount.

A third of the way to the west was cleared, the twilight was dim, the sun was like blood, and it was time to go back.

With Su Bai's current ability, it is not enough to stay outside the city too much, and there are many types of flights at night.

Returning the same way along the route he came, some small details were captured by Su Bai.

The trees on both sides of the road seem to have denser green leaf branches?

Because the afterglow of dusk just now can be scattered on the ground through these dense green leaf strips to form speckled spots.

And now there seem to be fewer spots on the ground, so to speak, almost none.

Such a small detail caught Su Bai's attention, and he specially slowed down and looked at the trees on both sides of the road.

After a few minutes of staring, the trees didn't seem to move, and he dispelled his concerns.

Maybe it's because I've been thinking too much about the mutations of plants these days.

So he led the swarm to speed up, after all, it had been delayed for a few minutes just now.

Not long after the swarm left, the notes on both sides of the road shook and two new leaves grew in the light of the blood-colored sun.

……

As soon as Su Bai returned to the city, the system's prompt message sounded.

He doesn't have to think about it to know what the message is.

After returning to the building, Su Bai directly turned into a salted fish and fell on the rest chair in the hall to look at the prompt information of the system.

[Gained 345,120 bio-energy.] 】

[157 pit worms have been produced and put into use.] 】

In just one afternoon, Su Bai gained more than 300,000 bioenergy, and I have to say that the efficiency is quite high.

The horror of the Zerg is also gradually reflected.

Su Bai looked at the activated class illustrated book, thinking about which class to explode.

Stingers will definitely continue to explode, but certainly not all of them will be used for the production of stingers.

After seeing the blade, Su Bai remembered this type of troops, a typical assassin harvesting stream type class.

The agility damage is high, and I looked at the total amount of bio energy needed.

60 bio-energy, the cost of bio-energy is equivalent to that of an earthly stinger.

Su Bai decided to cultivate one first to see the effect, and if the attribute is okay, then cooperate with the termite gene to carry out a large-scale explosion.

……

In a minute and fifty seconds, a blade half the height of Su Bai shook off the slime on his body and walked in front of Su Bai with his head down.

The blade resembles an enlarged version of a praying mantis, but it has a shiny black shell, two recurved scimitars with no effort to slash enemies with their forefeet, and the muscles of its hind feet give it incredible bounce and agility.

The main thing is the temperament it exudes all over, cold! Ruthless!

It also seems more certain that it will be a ruthless killing machine in the future.

After clicking on its attribute panel, looking at the data on it, Su Bai also determined that he was ready to cultivate it.

【Name:Blade】

[HP: 100%]

[Bioenergy: 15/15]

[Strength: 107]

[Dexterity: 121]

[Stamina: 84]

[Intelligence: 55]

[Skill 1: Bloodlust (Passive Skill): When the number of enemies killed exceeds 50/500/1000, gain a 2.0%/2.5%/3.0% increase in all attributes for 120/100/80 seconds. 】

[Skill 2: Unyielding Will (Passive Skill): When the HP reaches the threshold of 1%, temporarily gain 10% strength amplification to give the enemy the final blow. 】

[Note: After the death of the blade, its corpse is recovered by the fungus blanket and cannot obtain bioenergy.] 】

Just the basic blade has such attributes, and its speed is below that of ordinary thunder beasts, not to mention the elite level and the boss level that combine genes.

Su Bai chose to combine it with the genes of termites.

A minute later, the blade walked out of the hive, its shape not changing much, but its forefeet were sharper than before, only the shape shrunk slightly.

[Name: Phantom Blade]

Strength has increased by fifteen points, agility by five, stamina by ten, and intelligence by three.

Then Su Bai decided to invest more than 150,000 creatures to cultivate two thousand five hundred Shadow Blades first, and the rest of the creatures could be saved first.

Leviathan will not be cultivated for the time being, and will be invested in bioenergy to cultivate Leviathan after subduing five cities within this month.

Taking advantage of the fact that the worm nest began to explode, Su Bai went to the industrial area to see how the construction of the Heart of Machines was doing.

Before Su Bai approached the industrial area, he saw a new factory being built.

These rare metal buildings glowing with silver-white light are all reminders of Su Bai's fantastic technology.

The Heart of the Machine is flying around at the moment, supplementing and modifying the group from time to time.

Walking through the unknown buildings on both sides, he walked in front of a large warehouse-style building in the middle, and a metal detector on the wall stretched out and began to scan Su Bai's information in all directions.

【Welcome...... Leader of the Machine. 】

As soon as the mechanical voice finished speaking, the mechanical hatch in front of him automatically pushed open, and Su Bai walked inside, and unknown mist began to spray around.

Then the automatic glass doors are pushed open one by one, and you can walk inward, and you can see countless mechanical arms below you are on standby by by the glass baffle in front of you.

The Heart of the Machine built this place downwards to avoid keeping the building too tall from being remembered.

In front of the robotic arm are conveyor tracks, which are responsible for assembling and transforming the mechanical parts, and the finished product is placed on the track and sent to the next location.

Walking to the right, you can see a mechanical hatch again, and the scanner above it senses that someone is approaching and begins to scan its whole body up and down.

After the scanning was completed, the mechanical hatch opened automatically, and the light strip on the left hand wall flashed green, as if prompting Su Bai to go this way.

Su Bai looked around and followed the prompts on the wall, and Su Bai saw a very open field, and several oversized mechanical arms were in standby.

This seems to be the place where large parts of machinery are assembled.

"It's kind of interesting."

Su Bai raised his head and looked at these mechanical arms and muttered.

Su Bai also knew the general situation, but since the mechanical military factory had not yet been built, he could not see the specific data information yet.

After waiting for a few minutes, Su Bai received a promotion message.

[The Mechanized Military Factory has been built. 】

Su Bai retreated outside the factory, and the Heart of Machines followed.

【Name:Mechanized Military Factory】

[Rank: 1st Order]

The basic functions are roughly the same as those of the mother nest, so I won't go into too much detail.

Su Bai can currently produce the most basic electronic mechanical soldiers, but Su Bai does not plan to explode this kind of soldiers, and the Zerg is enough.

Su Bai is interested in another function of the Mechanical Military Factory.

[Bio-modification: Organisms can be transformed into semi-mechanical structures, which can greatly improve the attributes of organisms, greatly increase their life attributes, and can be recovered by 80% after death]

This is the first time that Su Bai has seen the unchangeable function of increasing health, and the death recovery rate can reach 80%

The biological part can be recycled up to 80% of the original basis, and the mechanical part is estimated to be the same.