When I left the Mage's Guild to carry out the Spirit Queen's request, I found a sectioned off city.
''Since this city is really flying in the sky, I'm beginning to think that Lord Leinster, who accomplished this in human flesh, was something in human skin after all.

　I read in one of the history books the area of Nerdal and it says it is a circle with a diameter of five kilometers.
　I can't see from here to the edge, so I don't know if it's really that big, but I want to feel that this big city is floating in the sky.
　And I'm sure it's designed to prevent it from falling off even if it reaches the edge, so if I can apply that technology to an amphibian as well...that's all that comes to mind.
　But before that, I have to take care of the Spirit Queen's request.

''But even so, I didn't think the request from the spirit queen was to save lives.
The miasma is not to save lives, but to eliminate the miasma and not to create new demonkind. If people in this town continue to be exposed to the miasma, they will first become weak in body, then unstable in mind, and eventually become demons.
　I guess it's more like working to prevent the creation of demons rather than saving lives.
　If that's the case, why do you put off the inside of the mage guild where the most damage is done?　...Well, okay. There's probably a reason why I didn't tell you anything until I came here anyway.

　The miasma is a miasma that can be used to turn a person into a demon, if you breathe in the miasma, which is more than I thought.
　It's possible that the demon and the human race were originally the same species, but like a curse, they disappear after being purified, so they are definitely a threat to our existence.
　If the miasiasma turns them into demons, they will still have a mental breakdown and become demons, which means that they will become like mad warriors.
　In a way, that's more frightening.
　That's probably why both the empire and Blange switched to turning into demonkind with the demon stone.
　Well, in any case, whoever thought of this and did it is definitely a mad scientist.

''I understand that this is an important stronghold, whether the former is a human or a demon race, so if there are demons here, I won't show any mercy, and I'll help even one person who can help. If you need anything, please remind me. I'll transfer to you in a moment.
Thank you. We'll move in our spirit-formed state, just in case. Lydia, follow the wise Luciel.
Yes, sir.
　Lydia doesn't have the personality to refuse, and I have a feeling she's going to take on what she's told, but it's still better to have a say in the matter.
　Let's hear Lydia's thoughts for a bit.
　Then we split off in eight directions to look for those who have become ill from inhaling the miasiasias and those who have turned into demons.


　I'm not going to be the only one who has a problem with the miasma.
　In the past, the spirit queen would work for me and Lydia, who have been given the spirit's blessing, but she didn't interfere in the lives and deaths of other human races.
　But this time, they worked to save the lives of the human race.
　It's true that the miasma is true, but I believe that the spirit queen has another purpose in mind that she hasn't told us about.

'Do you know why the Spirit Queen put saving lives ahead of Brange?
　Then, showing a little pretense of thinking, Lydia started to answer my question.
''Well most of the people in Nerdal have nothing to do with the research on demonization, and the spirits are not good at miasma, so perhaps it's because they thought the cause was somewhere in this city and not in Brange's laboratory?''
　I see.
　With the presence of the demon race and the spirit stone, they assumed that the source of the miasma was that place, but it's possible that the real problem was something else.
　
　The miasma in the city should have all but disappeared because the current Nerdal has invoked a purification wave filled with magic power with all its might.......

''Ah!　Wait.......... You activated the Purification Wave as fast as you could, but it's possible that the power was also weakened because it was across the building? Was that what the spirit queens were supplementing it with?
Maybe, maybe not. It's just that I don't know why he didn't give me a telegram.
'Either it was because there was the slightest chance that they could detect a fluctuation in magic, or it was to leave the Mage's Guild in a natural way... the only two things I can think of are...'
'So, Master Luciel, you're going to go around to all the houses?
　Lydia's face is cloudy as she looks at the plotted city, but as expected, it's impossible to go through all these houses.
　
　Plus, if we don't enter the house, we won't know who has recovered, and we'll be able to kill two birds with one stone.

'No, I'll search for signs and magic and activate Purification Wave in suspicious places, but I'll activate Heel or Middle Heel at the signs of weakness.
'How can your magic power last after doing that?'
'Oh.
　Now I know why they were hiding it so well.
　How did it leak out from where and how did it prevent the World Tree from being revealed that it was here in Nerdal?
　I know what it means to put it ahead of the spirit stone.

''What's going on here?
　I don't think it's a good idea to let Lydia know about this just yet.
　She's so serious, and it's going to show in her face right away.

''I just remembered a few things. I'm sure you'll be fine, since I've gained a lot of magical power from the benefit of my increased level.
'I see. But please don't take it easy.
Yeah. Let's go.
　So the real purpose of the Spirit Queens was to protect the World Tree and purify it of all suspicious parts.
　I remember talking with the time-space dragon and he said that the World Tree has the ability to counteract the miasma.
　The miasma is still at a very small stage, so it's not clear if the miasma is strong enough to counteract the miasma, and it's quite possible that the miasma could have an adverse effect on them, just like spirits.

　Furthermore, the reason why they gave priority to the World Tree is because the demon race in Blange's laboratory was such a demon race that it could be burned by a mere two purification waves, so they must have judged it to be no big deal.
　Perhaps the person who was burning just now was just a researcher who wanted the power of the demon race.
　Then it all makes sense.......that's when I thought I had a flash of confidence.
　The miasma rose from the center of the Mage's Guild as the Nerdal shook violently with the sound of a violent explosion.
　'I don't know who's influence it is that makes me feel like I can somehow do all the heavy lifting better than using my head badly... but that's me now?

　The miasma is a miasma that can be a very serious disease.