Shikkaku Mon no Saikyou Kenja~ Sekai Saikyou no Kenja ga Sarani Tsuyoku Naru Tameni Tenseishimashita~

"Rankin 'Demon Ore?

'Oh. It's a special ore, including the' Rankin Demon Crystal 'that makes it a powerful magic bomb material.... building materials are naturally faux'

Now it's clear why the Demons are purposefully using humans.

Rankin Demon Ore is contaminated and rendered useless when other than humans try to refine it.

If it is a rankin demon crystal after refining, it is fine for the demon clan to come close, but refining operations will definitely require humans.

This nature wasn't originally found in Rankin Demon Ore, but I used massive magic in my previous life to grant that nature to Rankin Demon Ore around the world.

If I hadn't worn that magic, the Demons would have completed the magic bomb and this world would have been doomed for so long.

"Magic Bomb... is that dangerous?

"If you prepare about a ton of Rankin Demon Crystals that are 100% pure, you can destroy about one country"

As I say, I look inside the refinery.

The purity seems to be close to 100%, but as far as the refining pace is concerned, is the production capacity something like 200 grams a day even when it runs for 24 hours?

The map should have depicted about five refineries of the same size, so more or less a ton in 1,000 days - you'll get a Rankin Demon Crystal that can just destroy the country.

"In a ton, one country!?

'... It's a hard ore to refine, so collecting a ton isn't that easy. Trying to make a ton out of one of these refineries would take nearly fifteen years to calculate... but this is still a pretty high-level refinery'

That's how I see the machines that were put in the factory.

Refining Rankin Demon Crystals to near 100% purity requires a very high level of equipment.

'Yay, it's certainly a demonic prop over there, it's very complicated... I have no idea the structure...... I don't feel I can make it......'

'I know the structure somehow, but it's not something I can make just because I get it. Compared to making that one, it's as simple as making a Ten Granted Devil's Sword. "

Even if I designed it and Lurii is in charge of manufacturing it, I can't make this level of refining machinery.

Naturally, it's not the kind of substitute you can make for a subdemon tribe or anything like you've seen around here.

I guess I've found a refining machine made by the previous civilization from somewhere, with a higher-ranking demon clan that is better at magic technology on the back.

The Magnetic Fusion Furnace, which destroyed the previous civilization, is also fuelled by Rankin Magic Crystals, so if it's a refining machine built for Magnetic Fusion Furnaces, it could be somewhere if you look.

As far as the apparatus is concerned, the atmosphere is that the apparatus used by the previous civilization has been modified so that high-purity Rankin Demon Crystals are available.

If it's that level of modification, it's less difficult than making it from scratch.

"Are you new here? I'm going to explain to you how to refine."

When I saw us standing at the entrance to the refinery, a man approached me.

The name tag says' Plant Manager '.

Even though it's a refinery, the title looks like a factory manager.

... This guy's not a demon, he's a human being.

I feel slightly demonic magic from my body, but this is probably the magic of a thought manipulation system.

The adventurer at the bottom can only do with 'thought dulling', but I guess that means the leader who gives instructions to that adventurer manipulates it well.

"Is refining difficult?

"Heavy labor, but doing it is easy in itself. But it is also a dangerous task. Listen carefully if you don't want to die."

That said, the factory manager approached the nearby machine.

Five meters around the machine is surrounded by a sturdy junction, with a vibrant atmosphere.

"First, put the ore in the tank at the top of the machine and close the lid. All you have to do is push the button and wait about five minutes for the crystal to come out, so all you have to do is put that crystal in the box"

That being said, the factory manager indicated with his fingers the location of the button, the first time the ore seemed to be already in the machine.

Only the apparatus of the previous civilization is quite sophisticated.

Perhaps by the time it was used in the previous civilization, there was a device that automatically put the ore in as well.

"Of this, where is it dangerous?

"That's right... this device, it explodes sometimes when you press a button, about once every forty times. We have about ten seconds before the explosion, so I hope we get out of the junction by then... there are a lot of guys who get used to it and evacuate slowly. Four more have died this month. It's still safer than the mining squad."

I see, an explosion?

Perhaps there is a problem adjusting when modifying demon props.

The machine itself is sturdy, so it's okay to have a small explosion, but if you get caught in an explosion, there's not a single defenseless human being.

But that's a good number of dead people.

If that's all the dead are out there, it's also convincing that the atmosphere in the city is dark.

Moreover, the refining squad seems to be still safer than the mining squad.

Still, I guess the Demons are up to something to keep people out of the city. Perhaps' thought slowing 'is one of them.

Although we can withstand defensive magic, we can be sure that the Demons will find out.

We wouldn't get caught up if we weren't caught off guard, because it's supposed to be the impact of 'thought slowing' rather than getting used to it.

"That's it. When you're done refining all the ore that's loaded there, you can go home. About six hours."

That's what the factory manager refers to, a mountain of ore.

Quite an amount...... if we make full use of the capabilities of this refinery, we'll figure it out in three hours.

But if you end it too soon, you're going to be suspicious.

Do you want to spend as much time here as the factory manager told you?