Every 100 years, an intelligent being is summoned like clockwork.

A beast from a desolate planet.

A high tier elemental spirit.

Sometimes even a “hero.” Or a villain. Depends on your definition of a hero.

Usually, the coalition between nations work together to subdue this being, due to the potential threat they may pose.

Sometimes, they won’t even need to do anything, since for example, a being from a water planet or a planet with lower gravity would not be able to adjust, dying soon after.

They are valuable.

Strange materials and knowledge, allowing the continent to progress at a rapid pace.

In every person, there is a small organ just below the liver that circulates mana.

“Otherworlders” are also a valuable magic catalyst.

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The tower makes frequent requests on preferably live test subjects to conduct experiments.

However, it is inevitable that some slip through the cracks.

It has already been 100 years, and the coalition’s meeting has been delayed due to the war between the elves and the humans.

Normally, the heads of each nation are supposed to meet in the neutral holy land, the town where the previous hero called home.

Nobody knows where he is now, most of his records are erased.

Rumors say that he was either eaten by a demon or forcibly taken as a test subject.

A few months ago, the oracle received a divine revelation.

A veil of darkness descends. Beware of the one who walks among you in the shadows, for they will bring ruin.

“Dispatch the inquisitors to Wesclim. The mysterious disappearance of the bodies is very suspicious, not to mention reports of the dead roaming alive at night. I strongly encourage the usage of charms to boost your mental defenses.”

“Yes, your holiness!”

He sighed. After the death of the demon king, there had been frequent disputes over territory.

‘I wish that we would all work together to rebuild instead of fighting each other…’

The paladins are overworked tracking down the remainder of the demon army.

The human territories are fighting for control with the elven territories.

Most worryingly, this “creature” would be quite difficult to track down with the lack of manpower, and with the prophecy suggesting some sort of intelligence or trickery.

Perhaps a skinwalker?

They had encountered a few in the war against the demons, but they were mostly low ranking demons with minimal intelligence, picking off an isolated villager or two at night.

A wraith? An illusionist? A trickster? Or even a dream demon, which could be particularly troublesome to deal with, transferring from host to host, killing anyone with weak mental defenses.

He pinches the bridge of his nose, then starts on the ever increasing pile of documents.

He glances outside.

The weather seems particularly dreadful today.

A thunderbolt strikes in the distance…