"Guaaaaaahhhh!

　The black dragon, Gyugga, was thrashing about on the ground with the pain that assaulted his body.

　The place where he was cut had heat, and his crushed eyes conveyed a devouring, intense pain. 　

　--Until now, the black dragon had rarely experienced pain.

　The enemy was a weaker fish and insect than he was, and therefore he had never been properly attacked by the enemy.

　It was the first time in his life that he had ever been hurt this badly.

"Humph. ...... You are a clumsy man.

"Grrrrrrrr!

　It's a very good thing that you're able to get the best out of it.

　It's not just a simple matter of time before you get to the point where you'll be able to get your hands on it.

You've been belittling Yuki for so long, but when you're injured, you warble on and on. It's a good thing that the dragon king is listening to it.

"Shut up, Reficios! And I already killed him! Your precious, precious bug, I've trampled it down!

　I ate its arm and its wing. It fell to the earth, and I could see with my remaining eyes that it had stopped moving.

　He's not moving anymore.

　I had intended to tear it in half and eat it all, but the obliteration of one of its eyes threw me off my senses of distance and that's what happened. ...... But that didn't change the fact that I killed it.

　I'm sure you'll be able to find out what's going on in the world.

　I'm sure you'll be able to find out more about this in the future.

"How? Who killed who?

"What ......?

　At the words of Horyu, he turned his head hurriedly to the man who should have crushed him - a look of astonishment and trepidation appeared on his face.


　--He was standing (・・・・・).


　The man you thought you had killed for sure, before you knew it, was on his feet.

　The man, whose body is tattered and injured to the point that it is no longer distinguishable from a corpse, however, is coming toward you with a weapon in his mouth, his foot in front of him, step by step, towards the black dragon.

　It is coming towards you with a weapon to kill the black dragon with such a body.

　--How is it able to stand up!

　By all accounts, it's already a fatal wound.
　It's strange to even be able to move.

　It's still understandable, since up until a few minutes ago, it looked like he had taken some kind of potion and was recovering, but now this man, judging from the condition of his wound, has not taken any potion.

　Still--it's moving.

"My partner couldn't die from an attack from you.

　The words from Horyu resounded in the black dragon's brain.

　--It's abnormal.

　Something is wrong with this guy.

　You feel as if your whole body is being swallowed by the strange air released by the man who was widely underestimated as an insect.

　Then, when the black dragon was staring at the man, his eyes met with the man.

　With a grin, the man smiled at him.

　The expression on the man's face sent a chill down the spine, and when he noticed, he took a step backward.

You'll be able to see that you're not alone.

　The black dragon yelps and swings its tail at the man.

　The man took a decent bite of the attack, bounced a few times and rolled to the ground - and after a while, he stood up again with a munchkin.

!

　It's as if you weren't attacked.
　As if nothing had happened, you kneel down and stand up.

　The scene sent a cold feeling down the spine of the black dragon.

　--I understand.

　Perhaps she is immortal.

　Like the undead...or even more so than the undead...it's a monster that can't die even if you kill it.

　--This man is dangerous. This man is too dangerous.

　The black dragon's instincts are screaming.

　Right here, right now, this man must be terminated for sure.

　But a half-hearted attack will surely fail to strike again and again to finish him off.

　So I'll use the Dragon's Roar, the strongest magic for dragons.

　I'll wipe out her existence without a single piece of flesh.

　You must erase her.

　After making that decision, the black dragon builds up its magic power in its mouth, takes a deep breath in and - with a wobbly vision (・・・・・・・・・), it falls to the ground (・・・・・・・・・・).


　　　* * *


"What, ......?

Ah, finally, you're down, huh?

　I smile at him with a grin as I see the d*mn dragon, which has been giving me a lot of shit, fall down with a thud and the earth shaking.

　The f*cking dragon seems confused and doesn't seem to know what's going on, looking around in circles to assess the situation.

　His mouth doesn't seem to be moving properly, and he's not running smoothly.

"Heh, ...... that worked, man, it looks like.

　The pain has been so painful that it makes me want to cry, but it's worth it.

　--It's easy to see why he collapsed.

　It's easy to see why he collapsed because I made him do it (・・・・・・・).

　The dragon tribe is awesome.

　I'm sure you'll be able to find a way to make the most out of it.

　But--those powerful creatures, the dragons, are also a category of living things (・・・・・).

　They breathe like me, sleep like me, and take in nutrition like me.
　I know that well when I live with Lefi.

　That's why I've set up a trap for the air around here, something that would be a universal weakness for any living thing.

　--Carbon monoxide.

　I was manipulating the functioning of the dungeon, changing its proportion in the air.
　Within this dungeon, where I am the law and I am the world, such a thing is possible depending on my perception.

　The air in this world contains an enigmatic substance called magnesium, but the rest of the composition of the atmosphere is close to that of the previous life.
　No, maybe it's different, but I know that there are substances here that are similar to those in the atmosphere of the previous world, such as oxygen and carbon dioxide, and they have almost the same properties as those in the previous world.


　I learned about it when I taught Iruna and her friends about combustion experiments.

　Carbon monoxide is a familiar yet powerfully toxic gas known in previous lives.

　At concentrations above 0.15 percent, the organism would experience severe dizziness (dizziness) and nausea, and would not be able to stand upright.
　If it exceeds one percent, it is a very frightening poisonous gas that can cause instant loss of consciousness and even death.

　I took a bet that such a deadly poison to living creatures is equally poisonous to the world's most powerful race, the dragons, and I won.

　I'm not sure if she was going to let out her dragon's roar to finish me off, but she took a deep breath and let a lot of carbon monoxide into her body, knocking the d*mn dragon into a coma.

　From now on, let's call him Demon King Gambler Yuki.

　The reason why he used carbon monoxide was because we knew from the battle up to this point that he had no detection skills, but if we spread ordinary poisonous gas that can be used by DPs around the area, there's a chance that the smell of it would be noticed.

　On the other hand, if it was tasteless, odorless, and colorless carbon monoxide, it would be extremely difficult to notice that more of the invisible carbon monoxide was beginning to drift around.

　Nothing could be more suitable to go unnoticed as a poisonous gas.

　The reason I've been using so many explosive dungeon traps is to increase the carbon monoxide production in the traps due to the incomplete combustion of oxygen, and to make it harder for the traps to notice that I'm manipulating the composition of the air.

　Well, Leffi immediately realized that I was doing something clever and put a sort of air barrier around herself to deal with it. ...... This d*mn dragon didn't realize that until the very end.

　That's just the way it is.

　I'm also safe because I used my primordial magical wind to create a layer of air around myself, just like Leffi.
　It's because I was using it that I couldn't unleash my magic the whole time: ...... I wonder if this guy didn't think that was suspicious.

　You just don't have enough attention, this dragon.

　Go to the other side and come back to life.
　If you're lucky you'll get a second chance at life like I did.

　--And as I took the hilt of the flame of sin in my mouth again, I dragged my already overwhelmed body and moved forward step by step towards the black dragon.

''--! --ck!

"I don't know what you're talking about, man.

　--It's not just a matter of time before you'll be able to get your hands on a new one.

　I'm sure you'll be able to find a way to make your life easier.

　But I can't hear that voice.

　Even if you could hear it, it's too late.

　If you had been more reasonable, things would have turned out differently. ...... No, they don't.

　Well, don't worry.

　I don't want your body to be ...... material, so I'll DP it all out and use it to enhance my dungeon.

　Go ahead and die without a care in the world.

　--Before long, I'll be standing in front of him.


"Then I'll be in front of him.


　You will be able to find out the best way to get the best out of your own personal life.

　You can find a lot of people who have a lot of experience with this kind of thing.



　--And its head was cut in two.