“…… The DNA sample of this particular animal was found in the data that flowed out of the Ark Count library because of the battle, and the animal itself can secrete a catalyst that allows the nitrogen fixation reaction to be triggered without lightning, and the animal itself uses the guò nitrogen fixation reaction to reduce the surrounding temperature to adapt to the high temperature of the place of residence, and at the same time has the constitution of immune to highly toxic nitrogen compounds, we have conducted preliminary experiments to determine that this DNA can be used for the TF modification of the meat system, if the modification is successful, so that it can be surfaced. Can create a powerful TF that can secrete highly toxic nitrogen compounds to kill enemies...... Considering the difficulty of the real yàn, we need more living embryos......"

- 2154, a secret report by Romons Biotechnology (the predecessor of the Rohms Group).

***

"It's okay, I'm here just to meet him."

Under the dim street lamp, Xia Xuefei, who had long black hair, raised her hand, pulled her hair, and spoke into the headset a little lazily, as if she didn't hear the alarm from Bokenshi's room a little behind her.

"You guys can evacuate by themselves when you get the numbers, don't worry about me, over."

Xia Xuefei spoke again, and then the communication was interrupted, the girl took the headset away from her ear and threw it on the other end of the bench, she rolled her eyes, glanced at the mobile phone in her hand, and then threw the mobile phone on the chair as well.

The girl stood up, took a deep breath, walked to the middle of the empty road, and then stretched out her hands and pointed to the space in front of her, which was the direction in which Ling Yu was about to pass guò.

Then, a gust of convective wind lifted her long hair.

***

"The fire alarm in Bokenshi's room was deliberately triggered, and it is not known who triggered it at this time, but Helis has confirmed that her drone has most likely been hacked by the other party. Lose their function and even become hostile, but according to the information she supplied, most of these drones are reconnaissance and early warning types and will not pose much of a threat to us. ”

"So you also carry a gun when you dance?"

Ling Yu raised his hand to tear open his bow tie and threw it on the side of the road, changing the subject. And Arya. Sinaire held his phone in his left hand to receive messages from Helis, and loaded his pistol with one hand in his right hand.

"This is a war zone, Captain." Arya closed the safety with her thumb, put away her phone, then lifted the skirt of her black evening dress and pulled out another pistol from the leg holster on the left side, "Besides, I didn't dance, I just came to accompany the little princess." ”

With the balance of the meat system TF, it is really not difficult to fight in high heels. However, judging from the rows of magazines on both sides of the white safety pants and safety pants, Arya is really well prepared.

"The security system along the road is paralyzed, so I suggest that we be careful." The girl, who had prepared another pistol, pulled out a black headset from the radio disguised as a headflower and pinned it to her ear, then looked around.

"Do you think I don't sprint with all my might just to protect you?" Ling Yu's mood was obviously still a little bad, and he choked Arya, but Arya didn't care, after all, what Ling Yu said was the truth, in this case. If Ling Yu ran with all his might, I am afraid that he would have already arrived in the real yàn room.

But obviously things won't be that simple.

"I'm sorry."

It seemed that he was aware of the fluctuations in his feelings, and ran a few more steps. Ling Yu apologized, but Arya didn't say anything, just smiled in understanding, and then pressed the headset and changed the topic.

"Captain, Helis asked if you want the Allied military police to intervene?"

"Let them come and die?" Ling Yu said angrily. But this time it's not for Arya, it's for the Alliance, "Icarus won't smash an airborne capsule for such a trivial matter, it's really an insider in the civil war, and an outsider in the foreign war." ”

Ling Yu was obviously still dissatisfied with the Alliance's efforts to hunt him down. This time, though, Arya sighed softly and pursed her lips.

"Wait!"

Ling Yu suddenly stretched out his hand and stopped Arya, and the young man in the black evening dress raised his hand to straighten out the white scarf that was wrapped around his neck by Helis and looked at the corner of the street in front of him.

Arya stood a meter behind Ling Yu and picked up her pistol, but she only put her thumb on the safety and did not open the safety.

"This temperature ......"

"This is the smell of nitric acid?"

Just as Ling Yu activated the hollow left eye, Arya also felt the abnormality of the environment—a gust of wind blew from behind her to the front without warning, and just around the corner where the sound of footsteps was heard, there was a chill.

Then, a girl in a white trench coat appeared in front of the two of them, the neat black bangs on the girl's forehead and the long hair on the back of her head were lifted by the hot convection wind blowing for no reason, floating in the air.

However, what is more striking is probably the drastic decrease in temperature around her appearance, and the changes in her body.

Red smoke lingered around her body, and on the hem of her trench coat, a lot of brown-red liquid had gathered.

But that's not all, after hovering for a while, the brownish-red liquid formed drops of colorless and transparent liquid, scattered on the ground, forming a small pool of water where the girl was standing.

"Left hand on the ground!"

Ling Yu's mechanical left eye turned, and the order was given almost instantly, Arya followed Ling Yu's instructions, completely subconsciously muscle reaction, and opened the safety of the left hand pistol, and directly shot a bullet at the stagnant water under the feet of the girl in the white trench coat!

Arya's twin guns are not all ordinary impact bullets, the girl's right-handed pistol is a kinetic energy bullet that mainly kills, while the left hand is a special ammunition, and most of the time, Arya's left-handed pistol is loaded with thermite incendiary bombs that can effectively kill TF.

The moment the incendiary bomb hit the ground, a violent explosion instantly lit up the night sky, but before the explosion dissipated, the girl in white suddenly rushed in front of Arya!

She actually rode the air wave directly and accelerated towards Arya!

Ling Yu made a wrong step and wanted to block in front of Arya, but he couldn't have time because of a slight miscalculation of the enemy, and at the same time as he launched, the girl in the white trench coat had already raised her hand knife. High up at Arya and slashed down.

Arya subconsciously raised the pistol to block it, but the 2025-style pistol was directly cut in two, and the moment the white trench coat girl's hand knife and the body of the gun came into contact, it made a sound like gold and iron striking!

It turned out to be ice!

Arya subconsciously retreated, but still couldn't dodge the opponent's attack - the light red ice blade wrapped around the opponent's hands grew three centimeters longer at a speed visible to the naked eye, and directly slashed into Arya's shoulder.

The blade slashed across Arya's chest. Ling Yu, who had already arrived, struck his knee and hit the lower abdomen of the woman in the white trench coat, but it was like being on the metal armor!

The girl in the white trench coat obviously didn't intend to continue to entangle, and chose to avoid it very carefully, and the moment she landed on the ground with a somersault, Arya also stumbled and fell to the ground on one knee.

Without any hesitation, Ling Yu turned around and hugged Arya. On tiptoe, he rushed out of the red smoke left by the girl, and Ling Yu, who flashed to the side of the road, gently leaned Arya against the wall.

"I'm fine...... Is nitrogen dioxide...... Ahem......"

Arya shook her head with some difficulty, she twitched slightly, and then coughed up a mouthful of blood, the brown-red gas produced by the girl in the white trench coat exceeded the lethal dose of a normal person in an instant, and even Arya, who was a TF, suffered a heavy blow to her lungs. It even affected the nervous system.

Ling Yu nodded, turned around and looked at the girl in the white trench coat again. He could feel his mechanical lungs racing, and the toxic gases were sent directly into the metal lungs before being exhaled again.

Besides, Ling Yu's physical strength was much higher than that of Arya, and even if he inhaled a large amount of nitrogen dioxide, he would not have the consequences of being too strict.

"One-on-one."

The girl in the white trench coat slowly stood up. Still with one eye closed, it seemed like he hadn't woken up, "My name is Xia Xuefei." ”

"Xia Ke is really a rare surname."

Ling Yu took a step forward, walked directly into the red smoke that had not yet dissipated, and stretched out his hand. Meaninglessly, he shook it meaninglessly, "Nitrogen dioxide, nice little trick, but it doesn't work for me." ”

Xia Xuefei looked at Ling Yu and didn't reply, she stretched out her five fingers, and the pale red ice cubes on her palms and abdomen instantly shattered and scattered in the air, and in the next second, red smoke burst out from the girl's body, changing together, as well as the surrounding temperature.

Under the action of low temperature, the condensation of brown-red nitrogen dioxide gas that had just erupted adhered to the girl's white trench coat, forming a layer of frost mist like blood, and at the same time, on the ground that had just exploded, the colorless liquid under the girl's feet also formed a smooth ice surface.

"It's minus forty-three degrees...... It is already possible to inflict substantial frostbite on ordinary TF. ”

Ling Yu's mechanical left eye turned, and while calculating the temperature, it also showed the previous results.

"Chemistry, nitrogen fixation, right?"

"Hmm."

Xia Xuefei nodded slightly, then took a wrong step back, arched her body, and slowly opened her eyes, which had been lazily closed, while the little water vapor left in the air quickly condensed on her right arm, forming a dark red ice-bladed long sword.

Then, Ling Yu attacked first.

***

Xia Xuefei's ability is not mysterious, and there are too many accompanying tables that allow anyone with a certain amount of knowledge of chemistry to see the source of her ability.

That is the nitrogen fixation reaction.

Nitrogen fixation reaction is the process of forming nitric oxide under the catalysis of oxygen and nitrogen in the air under the catalysis of lightning, this process was once called the "source of life", and it is this reaction that makes the empty earth have organic matter, laying the first foundation for the birth of life.

However, on the other hand, the nitrogen fixation reaction is also a small number of endothermic reactions, and the unit heat absorption of the nitrogen fixation reaction is even more than that of the barium hydroxide and ammonium nitrate reaction, which can freeze water at room temperature. In other words, Xia Xuefei can create a low temperature environment that is difficult for TF to withstand in a short period of time, and even, she can speed up the nitrogen fixation reaction in a fixed position through guò contact, freezing objects or frostbiting opponents in an instant.

Obviously, Xia Xuefei's ability is to be able to secrete a catalyst that lowers the threshold of the nitrogen fixation reaction, and this ability to do a lot in agriculture has been used as a means of killing, and the by-product of the nitrogen fixation reaction has also become her deadly weapon.

Nitric oxide is instantaneously oxidized into highly toxic nitrogen dioxide in the air, while high concentrations of nitrogen dioxide will condense into a liquid state at low temperatures, and as the temperature drops, the molecular movement weakens and bonds between nitrogen dioxide molecules, and finally becomes a colorless liquid nitrous oxide that will boil into a gas at 21.2 degrees Celsius and condense into a solid at minus 11.2 degrees.

Nitrous tetroxide is an excellent accelerant, which was once used as a propulsion fuel for rockets in the old era, and when Ling Yu used his hollow eyes to analyze the composition of the liquid under Xia Xuefei's feet, his first reaction was to let Arya directly blow up this guy who was still posing into the sky.

But obviously, Ling Yu underestimated this girl with strange abilities, and Xia Xuefei had already proved with her own actions and Alia's blood that she had the qualifications to fight Ling Yu head-on.

In fact, Xia Xuefei is the out-and-out number one thug of the Romans Group, and her special ability allows her to not only fight head-on with most TFs, but also kill hostile targets in groups.

Whether it's nitrogen oxides or deadly freezing, it will cause continuous and terrifying damage to TF's flesh.

Especially the latter.

As soon as Xia Xuefei's right hand was raised, blocking Ling Yu's fist, the ice blade splashed out a piece of debris under the huge impact, like a beautiful ice flower. (To be continued......)