As soon as the Stronghold task is released, I see that there are three tasks in the Properties panel that are pending to be completed at the moment.

[Mission 1: Obtain Creature Cores, 8/14]

[Mission 2: Stinger Swarm Size, 7297/50000]

[Mission 3: Occupy the city, 7 days remaining]

Leaving aside the kernel for the time being, if the size of the swarm wants to reach the 50,000 mark, it is necessary to use all living things to breed stinging insects.

An elite-level stinger requires 55 bio-energy, and to grow to a scale of 50,000, it needs more than 2.3 million bio-energy.

When you think about it, bioenergy is not enough......

However, the system gives a time of seven days, indicating that there are still many undetected beasts in the city.

Su Bai checked the existing biological energy again, and prepared to use it all to explode the elite stinging insects.

A total of 230,000 bioenergy has been invested, and it is expected to produce more than 4,000 stinging insects.

Then two more fungus blankets were cultivated, and the size of the swarm became larger and larger, and the fungus blanket was already a little insufficient.

After doing all this, I also returned to the building to rest, quietly waiting for tomorrow's explosion.

……

As soon as he got up the next day, Su Bai received another prompt message from the system.

[Obtain an Earthly Thorn Worm Boss Rank.] 】

【4,112 Stingworms: Elite Cultivated】

[3,000 earthly thorn worms have been transformed, and 172 thorn bugs have died: Elite]

[Swarm of Stingers: 11237/50000]

Now having two leader-level stinging insects has undoubtedly helped Su Bai share the pressure.

The two Boss Rank each lead 5,000 Elite Thorn Worms, and make sure that there are 1,500 Earthly Thorn Worms out of these 5,000.

This was done to improve the efficiency of the clean-up, and the other units were still evenly divided into two units.

Then Su Bai followed one of the swarms to clean up.

Instead of dividing into several units before, they are now divided into two to avoid unexpected situations that could lead to mass deaths of the biters.

Moreover, the two Zerg troops will not be too far apart, so as to avoid accidents and untimely support.

Time passed quickly, and in the blink of an eye, it was night, and the two Zerg troops returned one after another.

Today's harvest is quite abundant, with a total of seventeen newly revived tyrants and seven beast-shaped beasts hunted.

A total of 517,200 bio-energy was gained, with the beast-shaped alien providing the highest bio-energy.

Today also saw a new high in access to bioenergy, and the mortality rate of the swarm divided into two units dropped dramatically.

The explosion continues, and there are still three hours to go, and while the explosion continues, the transformation and binding genes are still continuing.

The two do not delay each other, perhaps because of the relationship between the multiple combinations, the speed of this process has been greatly improved.

And today is really a rich harvest of seafood, the mutated king crab is very large, and the mutated crab meat is very delicious.

After a simple treatment, there was a fresh fragrance on his lips and teeth after one bite, and at that moment Su Bai felt that he had realized the freedom of crab meat.

Three hours passed quickly, and the system's elevation message appeared.

[New Elite Stingworms: 9400]

[Transformation of earthly spinning insects: 1570, death: 47]

[New Boss-level Stinging Worm: 1]

At present, Su Bai has more than 20,000 stinging insects!

[Swarm of Stingers: 20418/50000]

[Stinger Elite: 15908 pcs]

【Earthly Thorn Worm Elite: 4570 pieces】

[Earthly Thorn Boss: 3 Bosses]

As far as the eye can see, the green garden is almost full of spiny insects, crawling on the fungus blanket and resting.

The only trembling estimate is that there is only one number of scouts, but unfortunately Su Bai can't use this class for the time being.

Although the number of swarms has exceeded 20,000, the number of red dots in the city has also dropped significantly, and the amount of bioenergy obtained will also decrease.

There are still six days to go, and although Su Bai is confident that he will clean up all the threats in the city, it is really a bit difficult to explode 50,000 troops.

The beast-shaped beast is not a cabbage, so if you don't have money, you will cut it.

Su Bai thought for a moment and decided to let the three leader-level thorn worms lead the team, and also went to raid their lair at night.

And I went back to sleep.

……

At night, almost all the stinging insects in the colony poured out of their nests and rushed through the streets.

In a residential building on the edge of the city, a huge beehive has been built here.

This is a swarm of killer bees, and its internal class is very similar to that of the Zerg, which is not comparable to the rat swarm.

In the hive, the class division is extremely severe, and all killer bees obey the queen.

The worker bees who build the hive to collect materials are the lowest part of the class, and they build and collect materials day and night, as usual.

On the streets, the sound of dense running could be heard from a distance, and it was impossible to hide from a swarm of such a size.

Their running made the earth tremble slightly.

At this moment, a swarm of worker bees is collecting and building as usual.

"Boom ......"

The ground was trembling slightly, and several worker bees felt the change and summoned nearby worker bees to check on the situation.

Judging from the source of the sound, the black press was full of insect swarms.

Seeing this unexpected situation, several worker bees hurriedly flew back to report the situation.

After a while, a large swarm of killer bees came out of the hive.

They vibrated with large, transparent wings, and the spikes on their tails stood out in the moonlight.

They stared at the incoming swarm in front of them.

A sense of crisis instantly enveloped all the bee colonies, but because of the queen's orders, they had to defend the hive and protect the queen.

"Buzz ......"

A leader stinging worm motioned for the team behind to stop, because it was the first leader level and was old, so the new leaders had to listen to it.

It stared coldly at the killer bees that had come out to defend the hive, and then cocked its tail hook.

Seeing the scene of the boss, more than 4,000 earthly stinging insects behind him also erected tail hooks and were ready to attack.

"Buzz ......"

I saw a stinger falling from the sky, and the stinger penetrated out the killer bees that defended the hive, and many stingers pierced into the hive.

In an instant, nearly 10,000 killer bees sprang out of the hive, and this time the hive could be described as pouring out.

The queen bee behind it is estimated that she has been furious, and as a hegemon of one side, it has been subjected to such a provocation for the first time.

The killer bees that came out were not vegetarians, of course, and began to spray tail spikes at the swarm.

And the stinger side was not to be outdone and launched a charge!

Since they fly in the sky, the stinging worms have to use their tail hooks to sweep away the killer bees in the sky.

Killer bees naturally found this advantage and carried out long-range strikes!

Some of the deflated swarms naturally shifted their target, which they then placed on the hive.

So, all the stinging insects surrounded them and went crazy to tear down their homes.

The killer bees in the sky were also confused, but it was important to guard the house, and they had to lower their altitude to stop it.

But as soon as they descend to a height, they are instantly cut into pieces by the tail hook.

They could only watch as the creatures broke through the outer structure of the hive and ran inward.