This is the world where souls gather [Zielenbelt].

The souls of all living things in the earth sphere gather here.

When humans and animals lose their lives, their souls return to this world=Zielenbelt. 　

There are six moons in the sky, and the [World Tree] is at the center of the world.

It is said that the soul rides on lightning and is returned to the World Tree.

A legend is passed down in Zielenbelt that in the distant past, there was a battle between the Gods and the Demon King.

Once upon a time, the Demon King summoned a gigantic "monster" that ate the energy of a "star".

That gigantic and long "snake"-like monster was called "Ouroboros."

Ouroboros circled the star from head to tail, covering the entire world.

When Ouroboros was about to drain the energy of the Star, the souls of people gathered at the center of the world and gave birth to the Gods.

The Gods destroyed Ouroboros and defeated the Demon King.

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However, humanity was caught up in the conflict, and many civilizations were destroyed.

The battle between the Gods and the Demon King was so intense that it caused a tectonic shift, and parts of the earth were peeling off like the bark of a tree.

The turned-up earth was imbued with magical power and rose to the surface, and was called the [Celestial World].

Then, the sunless land beneath it was divided into the [Demon World].

The remains of the battle remained in various places in the form of magical floating rocks = [Floating Rocks].

Furthermore, after the battle, the largest moon floating in the sky = [Giant Moon Ovum] was born.

Then, the remains of Ouroboros remained on the earth, and part of it became the earth itself. Legend has it that the origin of monsters was born deep underground.

The defeated "Soul of the Demon King" was divided into 〈16〉. Then, it was sealed in "Magic Tools" and "Magia Stones" and scattered all over the world as "The Cursed Artifact."

However, for humans, the "Soul of the Demon King" is an object of fear.

At some point, people recognized it as a "cursed item" and hated it, and the Cursed Artifact was sealed deep underground.

However, at a certain point, people began to be possessed by the magical power of The Cursed Artifact.

Nowadays, the soul of the Demon King is sought after as a powerful "magic item."

This story is about the battles and conflicts of those seeking the Cursed Artifact, in which the soul of the Demon King is sealed.