I don't know when it appeared.
It is possible that it existed long ago.
Or maybe it came suddenly yesterday.
It is a door, a black arch, and the material looks like steel. But in fact, when people in later generations who already have advanced technology scan it with the most advanced analyzer, they find that the material that looks like steel, its constituent elements do not exist in this world at all.
And its molecular arrangement is also a completely new structure.
This means that it is not of this world.
The first person to discover it was Clough.
A Westerner, or to be more precise, a businessman.
When Clough and his caravan, for some reason, had to venture onto a new route, it was right in the middle of that road.
So abrupt, so mysterious.
It is 56 meters high and 18 meters wide, with two closed doors carved with patterns and symbols of certain symbolic significance.
When Clave pushed the door that seemed heavy but actually had almost no weight, despite the objections of his men.
He didn't know that he was pushing open the door to a new era.
.
When the door opened, there was a dim world inside, with vague silhouettes of towering mountains just visible.
Kraft made an extremely crazy decision to explore the world inside the door!
This decision made him the greatest man in the new era, no doubt about it.
Despite the opposition, Clough overcame the resistance and, with a high reward, a makeshift expedition team emerged.
Led by Clave, the expedition team consisting of guards and coolies walked through the door.
Three days later, they returned.
There were eleven people in total when they left, but when they came back, there were only two.
Clough and a guard, they looked dazed and were covered in bedraggles. Anyone who was not blind could see that they had experienced something extraordinary on the other side of the door.
When people asked about the world behind the door, Clough said nothing and just had the door closed.
For a long time afterwards, he said nothing about his trip inside the gate. It was not until two years later that he took up pen and paper and wrote this passage.
'... It is a world that defies common sense, where hope and despair coexist, and light and darkness play together. There are unimaginable wealth there, but the devil guards them. Those dark people, those blasphemous existences. They are cunning and sly, don't expect to defeat them, how can a drop of sea water drown the entire ocean?'
Even though this warning was widely circulated, people continued to explore behind the door. After all, Clave did bring back something as valuable as gold from behind the door.
They are lighter than gold, but more brilliant in color. They are called "the devil's treasure" and are sold at eye-watering prices!
As a result, the door named after Clough became known to more and more people.
Legends of the inverse world, the people of darkness, and the devil's treasure continue to emerge...
And so, 37 years later, the second Kraft Gate was discovered.
Behind the door is a whole new world.
To do this, people have to number the inverse boundaries.
A thousand years later, a total of 127 Kraft doors were discovered!