It's like this is the heart of the Corroded Earth.

　Me and Liliera-san came to the farthest reaches of the Corroded Earth.

''This is... the center of the Corroded Earth?''

Yes, it's the most dense with toxins. I think it's the most concentrated area.

It's all so weirdly shaped.

　Liliera was right, the center of the Corrosion Ground is a strange shape.
　In fact, the center of the Corroded Earth was centered on a long, narrow, oval mountain, which was connected to a series of long, narrow mountains in seven directions.
　And only one of the mountains stood out from the rest.

'It doesn't look like a natural shape.

　However, it's still hard to read someone's intentions if they've intentionally made it this way.

Hmmm, what is this all about... hmm?

　And then I spotted the existence of something on top of the mountain.

Is that... a building?

　Yes, that thing is definitely a man-made structure.
　Could that thing be the cause of the corroded earth?

Let's check it out, Miss Liliella.

Yeah, yeah...

　We walked down to the building where we were standing on the mountain.
　That's when it happened.

"Geez, geez!

Miss Rieliela?

　Suddenly, Liliera-san started to suffer, spitting blood from her mouth.
　I held Liliela-san, who was about to lose control of her flight magic and fall, and examined her symptoms.
　Not only did Liliela-san vomit blood, but her complexion was earthen and her body was twitching in small increments.

''Is this........could this be a symptom of impulse demon poisoning!

　After finding out the cause of Liliera-san's condition, I immediately invoke the antidote magic.

''Grand Antidote!''

　As the glow of the antidote magic enveloped Liliella's body, the spasms in her body subsided, and a blush returned to her face that had turned earthy.

'Good, it looks like it worked properly.

...Ugh, what in the world am I...?

　The symptoms subsided and Liliera's consciousness returned.

'Are you all right, Liliella-san?　Liliella-san was suffering from the symptoms of impulse poisoning.

An urge...poison?

Yes, demonic venom is literally a poison that causes the body to twitch as if it has received a violent shock. Initially, the person will start off with vomiting blood and mild convulsions, but soon the degree of convulsions will increase and the body will convulse as if it were bouncing up and down. Then the shock of the growing convulsions can break bones all over the body, tearing nerves and blood vessels and finally tearing the body apart in a horrible poison.

Scary!　What is all this bullshit about a d*mn poison...

''I'm sorry, I was honestly caught off guard. The impulse demon poison is derived from a certain demon, so I didn't expect to encounter such a dangerous poison in this place.

Of demonic origin... is this demonic poison?

'Yes, it seems that being so far away from the center of the city has made the poison spread and weakened it. That's why it took me so long to notice it. I'm really sorry, Liliella.

'No, no, I'm the one who saved you. I should rather be the one to thank you. Thank you, Mr. Lex.

　It was my carelessness that got me poisoned, but instead of being angry with me, Liliella-san was even grateful.
　I'm really sorry that I put such a kind person in danger.

But then you can't just bypass it. Even if I could cure you with Lex-san's antidote magic, if I had to cure you over and over again, that wouldn't be enough for any number of lives.

''Oh, that's okay. The Grand Antidote from earlier doesn't just detoxify, it also has the ability to disable the poison for a while.

Yes, so I guess I'm still going to have to... what?　Disabled?

Yes, I'll be fine for a few hours.

....

　For some reason, Liliera-san fell silent when I answered.

''Huh?　What's the matter, Mr. Liliera?

　Maybe he's still sick?　If that's the case, maybe I should cast the antidote spell again.

'Wait, wait, wait. Lex-san used the magic you just cast to antidote the deadly poison that nearly killed me, right?　And yet that magic not only cures the deadly poison, it can also nullify the poison?

Yes, it can. Yes, it can, but there's a time limit.

"Whoa, whoa, whoa!　Isn't it strange⁉︎ that treating a poisonous substance and neutralizing it are two different kinds of magic?　Why does it just cancel the poison?

It's too much hassle to detoxify the poison again, so I think it would be easier to use a spell that analyzes the poison when detoxifying it and gives it temporary antibody effects.

It's never going to be easy!　Ordinary wizards can't make extraordinary magic with a little bit of a lazy attitude like that!

'But if you just detoxify the poison, you'll soon be poisoned again and again, and wouldn't it be better to be able to disable it for efficiency?

Well, yeah, that's true, but...

That's what I'm talking about. You don't just solve a problem, you use technology in an efficient way to avoid stumbling into the same problem the next time around.

Ummm....yeah...?

　Yeah, yeah, I'm glad Liliella-san seems to agree with me.

　If it were true, I would have wanted to permanently disable the poison, but as long as it's magic, it can't be helped that the effect will expire.
　Besides, that's why the magic item exists.

　Yes, we need to make a magic item that can counteract the impulse poisoning when we get back.
　If you use the materials that are available here, you can make one.

Then, let's go to that building this time!

Oh, oh...?