The status of the members of the special operations team is relatively special in the Night Blade, and it stands to reason that there is no official position, but because of Father Fang, in general, most of the members of the Night Blade will obey their requirements and commands, of course, the premise is not too outrageous.

And Wang Yu's request at this time is not too simple for them, this is a world with magic, and compared to the Middle Ages of the earth, the productivity is basically one heaven and one earth.

There's never a shortage of salt here, and as for the water, not to mention that this place is the sewer exit, it's not difficult to have a few water magicians who take turns to perform a show for you.

It's more difficult to find a magician who knows thunder magic, but it just so happens that there are a few mages in the "Echo Cabin" who have just finished their tasks, although they are all some old men, but the level of a mage is not covered.

Several wagons with large quantities of salt were spread out in huge stone jars made by Avia and several Magisters, and after that, while the water mages poured water into them, the water from the sewer outlets was introduced into them, and the rest was left to the old mages and wizards.

Most of these weather-beaten old mages are above the level of mid-level formal mages, and it is simply one of the easiest things for them to cast a constant current, no need to burst out, no need to chant at high intensity all the time, and no need to worry about enemy attacks, there is almost no difficulty.

A few metal rods were inserted into the pool of highly concentrated salt water, and several old mages began to gather their magic, strange purple arcs of electricity emitted from the tips of their wands, and some of the spilled elements made their white beards and hair stand on end.

It may seem a little funny, but their enemies may not have the heart to pay attention to this, and the arc does not need to be directly linked to the metal rod late, and in an instant, the high concentration of salt water begins to change.

As the bubbles are generated, a yellowish-green faint gas rises from the periphery of the energized iron rod, a large enough amount of highly concentrated brine to stabilize the current output of an uncertain voltage, which prepares chlorine. The efficiency of the air, the leverage.

"That's what you're talking about, chlorine. Gas? cough cough cough Charles leaned over and took a sip, and suddenly felt the sourness of Wang Yu's middle school teacher letting him slap him and take a sharp breath.

"Poof, my God, Wang Yu, I vomited blood, what are you!" Charles coughed and coughed as a mouthful of blood spurted out of his mouth, shocked.

"That's a nosebleed, you're coughing too hard." Wang Yu ignored him and looked at the pool above the pool where the yellow-green gas was gradually increasing.

Avia and a few Night Blade mages who weren't as good as mages were already standing at the back of the pool, and they were tasked with sending the yellow-green things down the drains to teach the Seventan rats a lesson.

"Oh, well, really." Charles touched his nose and found that it was really like this, he coughed too hard, and he coughed up the fragile blood vessels in his nose, and the blood entered his mouth from his nose, and then coughed out of his mouth, which looked like he was vomiting blood.

"Wang Yu, is this kind of method common for your alchemists?" Edward looked at the yellow-green gas, a little dignified.

He had just experimented with the sensation of touching these yellow-green gases, and there was a noticeable burning sensation on the surface of his skin, and it was when the concentration of these gases was not high.

With his physique still being affected, what would happen to vulnerable civilians or ordinary soldiers when faced with these materials, as the son of a great worker in the North, he saw much farther than Charr.

"I'm not an alchemist, it's just a little bit of knowledge." Wang Yu knew very well that he was not an alchemist at all, he was a pharmacist, but this discipline was despised by alchemists and kicked out of the alchemy category.

As for chlorine. Gas, this world is documented, but electrolysis of brine can produce chlorine. The theory of qi has indeed been discovered for the time being, for the simple reason that this thing was inexplicably coined by a group of scientists studying the usefulness of chemicals and electricity in the laboratory on Earth at that time.

There is magic in this world, but I don't care so much about the development of electricity, chemistry, etc., the so-called alchemy, the base is not chemistry, more of an important element of magic, and take it as the core.

It only involves chemistry and some physics in some materials, and the mainstream of this world is still extraordinary, perhaps the form of the place where the shadow of the royal city is more suitable for the germination of the so-called "technology".

No one has studied these miscellaneous things in the laboratory, so it's normal that they didn't come up with it, and it is estimated that it was a mage who stumbled upon chlorine. Gas is a gas that has been recorded and documented and has not been further developed.

This world is almost as Wang Yu imagined, and after there is such a thing as magic, many of the so-called "technology" are lagging behind, just like the novel "Sword of Dawn" mentions, will magicians invent refrigerators in the future, I'm afraid not.

Wang Yu didn't plan to divide the technology of the two worlds, after all, they went in different directions, and strictly speaking, even magic and even fighting spirit could be attributed to the infinitely vast field of "science".

Wang Yu has also thought about some things on the earth, such as guns, this thing can really pose a threat to him, flesh and blood, it is difficult to say that he can really ignore it when facing this kind of steel creation, even if it is a legendary knight, he has to retreat in the face of large-caliber kinetic weapons.

That is to say, in this world where the rules are not very different from the earth's current appearance, Wang Yu can do it if he wants to reproduce some things, but it is only a theory, he can be said to know nothing about those knowledge, gunpowder, he can't, circuits, he doesn't understand, and he doesn't know anything about many basic things.

At present, the knowledge of chemistry and mathematics learned from elementary school to university can help him very well, and mathematics is still for Avia...

Guns, but it's not impossible to reproduce, there are more convenient things in this world than gunpowder, magic, replacing gunpowder with burst magic, it's entirely possible, the bullet of the gun is essentially a more advanced use of energy, and the release of a concentrated point allows this power to reach its limit.

The projectile that uses the explosion of the fireball technique as a power source, and the point destructive power contained in it is definitely a few streets away from the fireball technique itself, and these are all left to Avia to figure out a way, Wang Yu really did not give up the "gun", a weapon of great combat significance.

Putting aside these somewhat distant things for the time being, Edward's worries are indeed a bit redundant, the use of this gas is very restrictive, the open place is almost useless, and the preparation of a large number of unstructured industrial supports is relatively complicated, and in general, in most cases, it is not as good as a super-large flame magic cover for the mage legion.

Now the situation is better to use, the closed environment of the sewer, as well as the humid air, the closed environment ensures all the chlorine. Gas can be a part of the destruction of the enemy, and the abundance of small droplets in the air in the sewers ensures that this chlorine. Gas can be successfully integrated into it to exert their unique corrosive properties.

Edward sighed, still a little worried, he could think of more when faced with this gas, which didn't seem difficult to prepare and had enough power to kill the transcendent.

Charles patted Edward's shoulder, "Why are you a mother-in-law at this time, you usually don't hesitate to beat me at all, what are you afraid of, Wang Yu said that this thing is of limited use, and you don't want to think about the curses of those magicians, the messy witchcraft of wizards, and the large number of undead of necromancers, aren't they all much stronger than this gas." ”

Wang Yu also patted him on the shoulder, signaling that Edward didn't have to care too much, Edward was not a really sentimental person, so he put it down and didn't say much.

"Hey, you see you're not thinking about it, you might as well think more about the beautiful cat sister on the street corner, I'll help you find out the name, Chelsea, civilian, your identity will definitely not be able to hold on to it, hey! You're hitting me again!? I'm here for your good! ”

Shaking his head, looking at Edward holding the Charr hammer with a black line on his face, he was not incomprehensible, in a sense, Edward's vision was quite long-term. Qi can only be said to be "universal" in terms of difficulty in preparation, but when something is universalized, then the power and meaning it contains are different.

But Wang Yu is too lazy to think so much, don't always think that he will bring any changes to the world, he is just an ordinary person, just do what is in front of him, there is no point in thinking so much.

"Ready, pour it in!" Edward beat Charles and left it to him to command, enough chlorine. The gas has appeared above the pool, mixing with the small droplets in the air to reveal a distinct yellow-green color that continues to grow darker as the amount of gas increases.

Multiple mages use wind elemental spells to control these gases together, and you don't have to worry about them overflowing or failing, magic is convenient!

With Wang Yu's command, the people who added salt and water to discharge continued their work, and the mages, including Avia, reasonably gathered the wind to form a breeze path, and these yellow-green dark chlorine. Qi poured into the sewer.

Sewer in order to prevent filth inside. The vents themselves are not considered to be involved in the vents when the gases emit and affect the outside of the city, and the sturdy materials used inside to prevent accidents such as biogas explosions, which do not know the principle but have cases, are sealed with the nearest sewer outlet. Qi will really exert their power.

As the gas poured in, the inside of the sewer soon began to smoke, and from the outside, it looked like a sea of yellow mist inside, completely obscuring the view of people outside.

Charles's scalp was a little numb, and he felt uncomfortable after inhaling a little, and the concentration of gas in it was probably no different from hell.

Wang Yu didn't care about anything else, he stared at the exit of this sewer, Ruby said, their most powerful combat power is high-level official knights, and blessed vampires are such things as he has never heard of.

Those who can fight head-on here are counted as Edward, who has opened the Burning Blood Drive and touched the threshold of a mid-level formal knight in terms of physical fitness, and a mid-level Night Blade squad leader of a formal knight.

The bulk of the output is definitely not on them, what they have to do is to contain it, those old mages and the trainee mages who are fighting with Avia are the real output heads, and they are preoccupied with Wang Yu ready to face the enemy who suddenly rushes out at any time.

Similarly, Edward had already given up the pursuit of the Charles, standing with Wang Yu with a shield and a sword, facing the direction of the sewer exit, and the two plus the team leader formed a standard triangular battle formation.

…

At this moment, inside the sewers, several people with black hoods covering their heads are discussing a blood-colored sarcoma attached to the wall.

"Is this so-called blessed vampire reliable?"

"Our clan assures you that there is nothing wrong with this thing, this is the ritual we gave you from Seventan, from your monster who is the source of life, it took us a lot of effort to get this thing out, at least give us a little bit of trust we deserve."

"Hmph, don't you think it's a bit funny that the family who betrayed your own kingdom still wants to trust?"

"Damn, do you want to cooperate, am I doing something for you or for you to laugh at!?" The hooded man standing on the sarcoma attached to the wall was a little annoyed.

"Okay, okay, but you'd better give me a guarantee of the effect, and we won't treat you badly."

"I hope so." The hooded man who was being taunted said coldly, and he could still hear the disgusting laughter faintly coming from the other party.

He shuddered at the gray worm-like thing that the Seventans used to torture and replace the city guards who entered the sewers.

What the hell is this blessed vampire in front of him who looks like a sarcoma, and can actually produce such a strange thing, and then he feels a little stunned when he thinks of the giant monster called the source of life.

"Oh yes, how can you call Elfin, the source of life, a monster, he's a great god, be careful with your words... Wait this thing. ”

After a pause, the Hooded Man of Seventan suddenly reminded him of the address to Elfin, but he suddenly noticed the yellow-green smoke that began to appear in the air.

These yellow-green smoke billowed and poured in, and he didn't know what it was, but it gave him a very bad feeling, and he wanted to hide from this thing in all directions, and when he saw it, there was already a low concentration of chlorine. The qi was inhaled by him, and the burning sensation came from the mouth and nose passages, and the emotions of shock and anger exploded.

"Alestale's! What's going on with you sewers!! Well?! The hooded man of Vincethan looked back, and was about to ask, only to find that the guy standing next to the blood-colored sarcoma had become two, or two.

Broken from the waist, the lower part fell to the ground convulsions and spurted blood, while the upper half of the body was grabbed by a blood-stained arm and dragged into the sarcoma.

The pupils of the frenzy met a pair of scarlet and malicious eyes.