Royal Calendar Era 438 January 25 at 8 p.m

"Now we have the entire underground fresh air system in our hands.

This favorable condition not only brings us the convenience of transportation.

I would say that we even have the breath of all living beings in the entire underground structure of Sara City! ”

Ergou continued the words of the eighteenth sister.

"I understand that, but as I said, we don't have the right weapons.

Well? Do you want to use poison gas? But there are humans in the underground buildings. ”

The eighteenth sister still doesn't know, so if she wants to quietly use poison gas to liberate the underground buildings, the human captives will also be poisoned.

"In order to maintain industrial production in Sara City, a large amount of industrial raw materials were hoarded in the warehouse area, so Anna was able to easily make a large number of bombs.

I'm wondering how we use carbon monoxide, we don't want it to be lethal!

As long as you can make orc warriors, temporarily lose the ability to fight.

There will be time for our warriors to go underground, wipe out the orcs, and free the enslaved humans! ”

Ergou said his thoughts, he was not sure whether his ideas were feasible, so he wanted to ask the more professional eighteenth sister for verification.

"Awesome my brother! Great, why didn't I think of that?

There are a lot of warehouses on the concentrated sulfuric acid, so let your mecha team find formic acid in other warehouses and get it back.

We can create a large amount of carbon monoxide in the ventilation ducts, destroy them one by one without alarming the enemy, and rescue the captives, Brother Dog, you are awesome! Wave~"

The eighteenth sister jumped up happily and kissed the second dog directly on the cheek.

"Well, don't be happy just yet, I'm afraid of carbon monoxide, whether it works for orcs.

If the dosage is too large, I am also afraid of causing permanent damage to the body of the people we rescue.

Or can we find other alternatives, mass-produced in a short period of time, with low or even no poison, as long as it can paralyze the orcs. ”

The second dog is still afraid of accidentally injuring his own people, and whether carbon monoxide can poison orcs.

"This needs to be practiced, but in my opinion, orcs are also mutated from humans, in addition to eating habits, IQ is not online, they have better body shape, and other physiological functions are still inseparable from human ancestors.

And the orc's body consumes more energy, I even suspect that the orcs will be worse than the human tolerance, and the orcs will be poisoned first, let's go up to Anna and talk ~"

The eighteenth sister expressed her opinion.

"That little ancestor, little devil, she is indeed an expert in mass destruction, let's go!" The second dog dragged the eighteenth sister back to the camp.

。。。。。。

In the camp, Anna, the Sword Brothers, sat comfortably around the campfire, Nana was still eating chocolate, and their mechs were guarding the cargo door.

"Coming back so soon? Dogs, your dog team is quite capable, and they have all taken fifteen warehouses! ”

Nana, who is obviously fine, has been listening to the dog team's battle channel.

"Hmmm! I'm still confident in their combat abilities, Nana, do you have any proposals for the upcoming underground structure battles? As soon as Ergou returned to the warehouse, he was anxious to ask Anna's opinion.

"It depends on what information your resistance can give us? I'd like to blow them up! ”

Anna took a big bite of chocolate, and the fire in front of her hit Anna, forming a long shadow behind her, looking a little ruthless.

"I'm always joking, scaring you Shu Xiao, this is a simple map, you can take a look at it first.

The underground structure is garrisoned by 100,000 orcs, 50,000 to 100,000 orc troops are dormant, and 50,000 humans are enslaved.

This battle is not easy for us to fight, not to mention that we have not completely occupied the ground, and at this time, there are no less than 100,000 orc troops stationed on the outer city wall, eyeing each other! ”

Ergou walked to the campfire and handed the map to Anna, followed by the eighteenth sister.

"Well, that's an interesting picture!

On the ground, your mech squad is enough to contain the enemies on the ground.

The troops of the city walls dared to move, waiting to be killed by my bombs.

It seems that the ventilation ducts can reach all the underground buildings? ”

Anna finished the chocolate in her hand and asked about Ergou.

"Yes, how about we use poison gas?"

Ergou still asked, although Anna's behavior was a little exaggerated, but her ability was beyond doubt.

"With this map, it couldn't be better, the warehouses in Sara City are full of all kinds of industrial production materials, and if you give me time, I can build a spaceship for you.

Ether is the simplest anesthetic gas, well~ but there are a lot of buildings in Sara City!

Or use CO, the concentrated sulfuric acid needed, the formic acid warehouse must be available, and sufficient, it is most suitable for mass manufacturing in a short period of time, should we start now?

Formic acid is in the nearby No. 2 warehouse, and Li Yang has already found a large amount of reserves according to my requirements. ”

Anna had apparently thought about something similar for a long time.

"Nana! You've been thinking about all this for a long time? Have you let Li Yang find the materials? If I don't say it, are you ready to do it yourself? Ergou asked.

"I just want to know, what's in the nearby warehouse?

Maximize the use of the resources we have at hand.

After all, you want to use a few hundred people to capture more than 300,000 orc troops and garrison Sara City.

He even wants to save 50,000 humans, and he wants to be unscathed!

Can I say, are you a little idealistic? ”

Anna stood up and pinched her waist with both hands, and looked at the second dog on the side defiantly.

"Huh? I'm speechless by what you said, do I have, Pepper? ”

In the face of Anna's accusation, Ergou reluctantly asked the eighteenth sister for help.

"Well, it's a little, but I understand you in this case! Even if you don't understand, I'll support you as your woman! ”

The eighteenth sister first shrugged her shoulders and agreed with Anna's opinion, and then threw an eyebrow at Ergou.

Receiving the eyebrows of the eighteenth sister, Ergou suddenly felt his heart flutter, and in order to avoid losing control, he hurriedly changed the topic.

"Then we need to catch some orcs for some experiments!"

Ergou directly opens the communication and enters the battle channel of the dog team.

"Warehouse 16 has been cleared, the defense has been deployed, and it is maneuvering towards warehouse 21! First Squad! ”

"Warehouse 17 has been cleared, the defense is deployed, and it is maneuvering towards warehouse 22! Second Squad! ”

The channel kept coming, and the results of each team were reported.

"Li Yang! I've been assigned a temporary assignment to you, to catch three or five orcs back, and if you want to live, I'm going to do an experiment! ”

Ergou's voice sounded abruptly in the channel.

"Yes! Guaranteed to complete the mission, Brother Dog! Li Yang replied simply.

。。。。。。

In the warehouse where the two dogs are located, they can find concentrated sulfuric acid, and they will wait for the dog team to bring back formic acid and orc soldiers for experiments.

Of course, before that, everyone needed to prepare various equipment and containers, and soon everyone started to vacate a container as an experimental space.

The manufacture of CO is very simple, and in the warehouse, a large iron drum lined with an anti-corrosion coating is used to store concentrated sulfuric acid, and heated as a reaction vessel, during which formic acid is continuously added.

The problem is the collection and use of CO, but all this is not a problem in Anna, a skilled craftsman.

Anna dismantled a cart in the warehouse, gathered a lot of needed parts, and quickly took out the finished product of the experimental reaction vessel.

As for the experiments of the orcs, a few people only need to make simple preparations, single experiments, tie the orcs strongly, and fasten the large iron bucket with connecting pipes on their heads to transport CO.

Group experiments, just send all the poor orcs directly into a sealed container.

As soon as everyone prepared everything, Li Yang's mecha four-person group brought back the four orcs who were tied up with five flowers, and the blue-faced fanged green-skinned orc, who was semi-unconscious before, was thrown heavily to the ground, and suddenly woke up and kept struggling and howling, revealing a fierce image to everyone, opening a bloody mouth, hideous and abnormal.

Seeing that the orcs were dishonest, the dog team members gave the dishonest orcs all the heavy rewards with the butts, and directly knocked out the two huge fangs of the orcs.

"Excellent! Send them all into the container, Li Yang will give me a cigarette! ”

Ergou looked at the struggling orcs on the ground, and couldn't help frowning, since he knew that most of the orcs were human mutations, imagining these orcs, the humans before the mutation.

Ergou once felt pity, but Zuo Wei said that the mutation of orcs is irreversible.

At this time, observing the orcs so closely, how can there be any signs of human beings, I believe that most of the people present have a sense of hatred for the orcs that is bred from their bones.

asked his subordinates to send the orcs into the container, Captain Li Yang directly withdrew from the mecha, respectfully approached to hand Ergou a cigarette and lit it, and brought himself a cigarette.

Then the two of them swallowed the clouds and spit out the fog in full view of everyone.

"Brother Dog? What is the big plan for catching orcs and formic acid? ”

"Suck~cough~Changed cigarettes? This guy is tough!

I have been in contact with the resistance in Sarah, and they will guide us through the underground ventilation network to attack the underground structures of Sarah City, waiting for an opportunity to free the human captives within.

Of course, the main part is to successfully free a large number of enslaved humans, and we need to use CO.

Now it's time to experiment to see if orcs can't withstand the toxicity of CO like humans.

Later in the day, when the army arrives, you arrange for people to enter the underground ventilation ducts and place battlefield environmental monitors in all underground construction areas to get first-hand and complete environmental information.

Embark on preparations for our next step, large-scale underground construction, and tackle tough tasks! “

The second dog took a big puff of cigarette and was immediately choked and coughed.

"Haha~ The newly discovered cigarette rolls in Sara City, the quality of the products after the war is average, and it is not enough to be strong!

Look at the time the support force is almost there, Brother Dog? You said that this Sara City is stationed, so many orc troops, why haven't we encountered decent resistance until now? This is not scientific! ”

Captain Li Yang said the doubts in his heart, obviously Li Yang was worried that the orcs had other terrible powers.