Chlorine.

chlorine, the green gas, that is, the green gas.

This kind of gas was first produced in 1774 by the Swedish chemist Schoeller from pyromanganese ore and concentrated hydrochloric acid on modern earth, and was not initially found to be of much use.

But it wasn't until the First World War, when it was first used by the German army in warfare, that it showed its horror.

Time, April 22, 1915, 5 p.m.

Location, Ypres region in western Belgium.

The warring parties, the German army and the Anglo-French army.

At that time, the tank of the king of the land had not yet been invented, and the positions of the two warring sides were densely covered with machine guns, barbed wire, and trenches, and neither of the warring sides dared to take the initiative to attack, otherwise they would have suffered heavy losses.

The war was at a stalemate, and eventually the German army decided to use their secret weapon.

With the order to attack, 6,000 tanks totaling 180,000 kilograms of chlorine gas were released, forming a heavy cloud wall, which moved towards the British and French positions under the strong wind.

When the German troops followed the chlorine gas into the British and French positions, they found the corpses of the enemy all over the place, and their faces and lips were a strange blue color, because the chlorine gas isolated the oxygen, which caused the blood to be extremely deprived of oxygen. Some of the wounded who survived gasped loudly, coughed, and vomited yellow mucus from their lungs, and died in agony as chlorine eroded their entire lungs.

All the metal exposed to chlorine gas rusted: the buttons on the corpse's clothes, the decorative badges, the coins in the pockets of the corpses had turned dark green, and the swords, rifles, and artillery guns that were scattered on the ground in their hands were rusted, and they looked like they had been immersed in water for months.

The position was in a mess, the corpses were all over the field, only this battle, 15,000 British and French troops were poisoned, 5,000 people died directly, the perfect position was torn open a gap of nearly 10 kilometers, and the German army drove straight into it and achieved a huge advantage.

Chlorine, or poison gas, such a powerful and fearsome demon of war, was unleashed.

In the era before the invention of nuclear weapons, it was a biological and chemical nuclear bomb, which could easily kill all the people in an area, and it would be a dead place for decades.

It's inhumane to use this, because it's so powerful, so it's inhumane.

In the cemetery, Richard held a heavy tin can, releasing chlorine gas into the downward passage, and raised his eyebrows.

The use of chlorine is indeed inhumane, but he does not intend to be humane to some of the existence in the cemetery, to the army of insect swarms, and what he says is also inhumane.

"Puff puff—"

Under the action of extremely high pressure in the iron can, it didn't take long for a can of chlorine gas to be released, and it frantically poured into the underground tomb. Without blinking, Richard put the empty iron pipe back into the spatial iron ring, and then quickly took out a brand-new, filled iron can, opened the lid of the can with a "bang", and continued to release chlorine gas towards the downward channel.

Richard decided to disinfect the entire tomb so that all the beings in the tomb could feel the power of the chemical agent. It was the reward, the reward for the frustration of his two successive expeditions.

"Puff puff—"

Soon, the second tin can was empty, and he immediately brought out a third, new, full tin can.

Then there was the fourth, the fifth, the sixth......

Today he came to the cemetery, and in the two spatial iron rings, he didn't bring anything, only iron cans.

Seventh, eighth, ninth......

Chlorine gas poured into the underground space of the tomb continuously, and Richard knew that because chlorine was denser than air, it would follow the corridor inside, going deeper and deeper, until the space inside was filled.

At that time, most of all living creatures will die, whether it is the mushrooms in the mushroom forest, the swarm army, or the rest of the monsters, they will not be spared, even if the vitality is as strong as the tardigrade creature water bear, it will have to lie dormant to survive. Lifeless mechanical creations will be corroded by chlorine and completely lose their functions.

The attack of chlorine is comprehensive, pervasive, and cannot be dodged or resisted, because this is not a level contest at all.

He didn't do it before because it was too time-consuming and he needed to produce a lot of chlorine, which was too cumbersome.

But now, he doesn't mind.

He is still in the recovery period after pneumonia and the subsidence of the multi-breath staining, so it is not a matter of wasting a little time.

As for chlorine, how much or how much is needed.

But...... The only constraint is the transport of chlorine.

In order to avoid exposure, he can only come to the cemetery at night and use the spatial iron ring to transport the iron cans containing chlorine gas.

Therefore, the reserves of the two space iron rings are the upper limit of the chlorine that can be transported at one time, and if this problem cannot be solved, he can only act as a transport worker again and again.

But this problem obviously cannot be solved, and you can only act as a transport worker.

"Whew-"

Richard exhaled lightly, the chlorine gas in the iron cans of the two spatial iron rings had been completely released, and there was no point in staying in the cemetery, so he released the "Earth and Stone Control" spell to repair the cracks on the ground and return quickly.

Back at the lab, he began to make new chlorine gas, liquefied it into liquid chlorine, and filled it into a tin can, waiting for the next action.

In this way, many nights after that, Richard's figure could be seen in the cemetery outside White Rock City.

In the tomb, the concentration of chlorine gas continued to rise, and eventually it turned into a demon cave with completely yellow-green gas.

Richard waited patiently for a while, making sure that the creatures in the grave were really dead, and began the next step in the disinfection operation.

......

Daytime.

There was a knock on the door to the courtyard of the laboratory.

"Bang bang bang!"

Alex's iconic voice rang out.

"My dearest friend, Your Excellency Richard, I got you what you wanted!

With a "squeak", Richard opened the door, and saw Alex standing outside the door with a trembling face full of fat, and he hadn't seen him for a while, and the other party had gained a lot of weight - his chin had been stacked to four.

Behind each other were several carriages, on which were bags of bulging things.

Richard glanced at it and didn't say much, just said, "Move in." ”

"Understood. Alex nodded, and with a wave of his hand, naturally the coolie man brought things in, and bags were piled up in the yard. Some bags are not of good quality, cracks appear, and white powder is quickly sprinkled.

The powder was like a snowflake, but it was not a snowflake, it was like salt, it was not salt, but it was ......

......