Chapter 37 is easy The creatures of the underground world are distinguished by the color change of luminous plants during the day and night, and these plants emit pale yellow fluorescent light during the day, and blue fluorescence at night, what is the specific principle Zhao Yannian did not figure it out, and the botany on the current otaku study list is very low.
After talking to Caroline, Zhao Yannian looked for a low-lying place to prepare for the second set of plans tonight, a huge metal tank appeared in the open space, the compression pump and the cylinder were neatly placed next to it and could be put into work at any time, the dwarf and the steppe elf were curious at this time to see Zhao Yannian's hand on the metal can glow from time to time, but everyone knew that Zhao Yannian was preparing for a sneak attack at night, and no one bothered him.
The types of explosives in the hands of the otaku are more diverse than before, a large amount of ammonium nitrate was put into a modified metal tank by Zhao Yannian, and carefully heated under Zhao Yannian's control, ammonium nitrate will produce nitrous oxide and water after heating.
The chemical formula of nitrous oxide is N2O, and all earthlings who have played racing games know that this thing is used for acceleration, but I am afraid that most people will not think that N2O is also a well-known laughing gas, laughing gas is colorless and sweet, humans will laugh after inhaling, and at the same time, intelligence, audio-visual ability, and hand dexterity will be affected, this gas is often used by dentists to perform simple anesthesia on patients.
The gas itself is harmless and may cause some degree of muscle atrophy unless inhaled for a long time, but the results of this kind of thing on dark elves with very low resistance to chemicals will be terrifying.
Previously, when torturing Caroline, Zhao Yannian almost killed Caroline by just injecting her with a small amount of soft drugs, which attracted Zhao Yannian's attention, so before the team to rescue the dwarves set off, Zhao Yannian secretly conducted similar experiments on several dark elf captives, and the experiment proved that the dark elves lack resistance to most psychostimulus chemicals, and only a small amount is enough to make them lose their resistance.
Therefore, Zhao Yannian had an absolute certainty that he could take down the Dark Elf Castle with superior troops.
After the laughing gas was extracted, it condensed into a liquid through a makeshift ice circle and poured into a steel cylinder that had been prepared long ago.
Zhao Yannian raised his head and looked at the light on the sky, and naturally said to himself: "The time is almost up." ” The otaku's face was full of smiles at the moment.
Caroline lay quietly on the bed to recover her strength, from the initial battle with Saladin, to the potion that Zhao Yannian used on her, to the truth of the disguise, walking on the wasteland with injuries for more than three hours, Caroline's physical strength has long been overdrawn, although the strength talent of the dark elves is very good, but their physique is very poor, which is a common problem of all elf species.
Other types of elves usually use the Natural Elements to restore and buff effects.
But the dark elves chose to use the power of darkness, and the dark element brought the dark elves stealth and attack, this gain has advantages and disadvantages, the advantage is that the combat power of the dark elves has increased a lot, and the disadvantage is that their fragile bodies become more fatigued.
It had been hours since she opened her eyes again, and the dark elf crawled out of bed after fighting through the tiredness and pain in her body.
"The master's task has not been completed, and he can't continue to grind here."
Caroline whispered and got out of bed.
Pulling a metal rod from her leather armor and grabbing a long skirt and putting it on her body, Caroline opened the door and walked out of the room.
Although the unknown castle is in disrepair, it has been carefully cleaned after being chosen by the dark elves as a temporary base, and Caroline, whose eyes sparkle inexplicably, walks like a ghost on the cold stone floor with her bare feet.
"Mistress Caroline?
Where are you going?
The priestess suddenly appeared from around the corner of the hallway.
"I'm a little stuffy, and I want to go outside the castle to get some air."
Caroline smiled a little moot.
"Your injuries are not healed, please rest as much as possible."
The priestess bowed her head and said.
"You don't need to do what I do."
After Caroline finished speaking, she ignored the priestess's reaction and walked straight to the staircase leading to the castle.
"Yes, my lord."
The priestess hesitated for a moment, watched Caroline's figure disappear into the corridor before turning her head and leaving in the opposite direction, she still has a lot of things to do, and after completing the task tomorrow, she can leave the family and officially become a member of the Spider Queen's Church.
In the underground world that has fallen into the night, the sky dome is like a starry sky emitting a faint blue light, Caroline came to the top of the castle, and after confirming that there was no one around, the dark elf took out the metal rod that she had tied to her thigh since she left Zhao Yannian, and the metal rod was turned on by Caroline and thrown on the ground on the rooftop, Caroline left the rooftop with a strange smile.
"How the hell are we going to defeat those dark elves?"
Saladin was sitting on the mechanical hand of the metal fortress at the moment and asked Xiang Xiang, who was staring at Zhao Yannian.
"When we rush in, the dark elves will be defeated."
Zhao Yannian, who kept fine-tuning the posture of the metal fortress, stared at the monitor and replied perfunctorily.
"But how can we rush in?"
Saladin still didn't know what Zhao Yannian's so-called second plan was, but the dwarves who had been getting along for a while had begun to trust the young human lord.
"When the dark elves open the door themselves, we'll be able to rush in."
Zhao Yannian said perfunctorily again.
"I won't ask you anymore!"
Saladin already understood that Zhao Yannian didn't intend to tell him what he was going to do, and the dwarf jumped off the mechanical hand of the metal fortress in a huff.
Just as the dwarf was about to return to the team for a drink, Zhao Yannian suddenly cheered: "It's here!"
” A puff of cyan smoke rose from the castle five kilometers away in the distance, and Zhao Yan began to nervously calculate something on the display.
"Shilu, the elevation angle is thirty-seven and a half degrees!
Fourteen degrees north-west!
With Zhao Yannian's order, the metal fortress was fine-tuned again.
"Shoot it all!"
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After adjusting his posture, Zhao Yannian commanded loudly to Xilu.
"Understood!
Full launch!
The alchemy circuit in Shiro's hand began to glow.
The rocket nest, which Zhao Yannian had never used since it was made, finally began to exert its power today, and twenty-four rockets flew into the sky with dazzling flames, and the huge sound shook Saladin to the ground.
Zhao Yannian has not yet made a fire control system that can be used in actual combat, so the launch of long-range weapons such as rockets also requires target positioning and manual ballistic calculations.
The rocket with a total length of one meter and a half and a weight of one hundred kilograms, and a twenty-kilogram warhead is already an ultra-long-range strike weapon in this world, and no one can attack so far except the legendary mage, and the twenty-kilogram warhead is now replaced by Zhao Yannian into a cylinder full of laughing gas.
The rockets hit the top of the castle accurately, and the steel cylinder that Zhao Yannian had specially made into a fragile item exploded when it hit the stone walls and ground.
Before the Dark Elves reacted to the sudden attack, the laughing gas had spread throughout the castle.
Four hundred and eighty kilograms of laughing gas mixed in the air would have little effect on ordinary people, but it would be a disaster for the dark elves.
"Hahaha, in the end, haha, it happened, hahaha, what!"
The Dark Elves who had inhaled the laughing gas began to laugh wildly, and their intelligence seemed to be affected to some extent, and they kept asking their companions what was going on, even though it was an enemy attack.
The steppe elves were left in place, and after firing the rockets, Zhao Yannian led the dwarves to smash the gate of the castle and rushed into the castle.
"Tie up all these dark elves, and knock out the mages!"
Zhao Yannian ordered to the dwarves.
"Don't do the lord's orders yet!"
Saladin yelled at his people.
"Hahahaha" A charming laugh came from the castle, and Caroline staggered through the open space between the city wall and the inner castle while laughing and threw herself into Zhao Yannian's arms.
"Ha, ha, master, you want to give me a reward."
The dark elf who smiled a little bit said seductively.
"Good boy, the reward is indispensable for you."
Zhao Yannian reached out and patted the dark elf's trembling back with laughter, and then pressed Caroline's carotid artery to knock her out.
"My lord, what are you doing with this evil creature?!"
Saladin felt a little uncomfortable seeing that his people had been rescued, but Zhao Yannian had not killed Caroline.
"She's already done us a favor after all, so let's let her spend her life in my dungeon."
Caroline is still very useful to Zhao Yannian, so it is naturally impossible for Saladin to kill him, so Zhao Yannian casually made up an excuse to fool Saladin.
"Hey, hey, I see, then I don't have any opinion."
Saladin looked Zhao Yannian up and down, suddenly let out a lewd smile, and then nodded to Zhao Yannian with an expression that understood everything, and began to energetically command the dwarves to bind up the dark elves to rescue the clansmen.
In less than half an hour, two hundred dwarves released their people, and the dark elves were tied with ropes.
The dwarven captive who turned over pulled the rope and passed through the city gate, but some of the dwarves looked curiously at the strange human sitting on the metal machine.
Saladin ran out of the castle sweating profusely, and when he saw Zhao Yannian sitting in a daze in the metal fortress, he asked, "My lord, what should I do next?"
” "You take your people and the dark elves first, and I'm going to stay here and see who is sacred to receive the dwarves."
Zhao Yannian replied.
"But isn't it too dangerous?"
Saladin asked worriedly.
"It's okay, I'm just observing from afar, and by the way, I'm going to make some trouble for them, otherwise I'm afraid that a large group of you will be caught up by the other party."
Zhao Yannian said with a smile.
"Then please take care of yourself, lord!"
Saladin tapped his breastplate with his right hand and said to Zhao Yannian sincerely.