FIG | THE LAND OF UNKNOWN WORLD

Arkatra is a rich world where many big events happened. Some of the events were significant enough that the world couldn't possibly handle them, as there was a time when someone from the world itself gained power that actually disturbed the world at a fundamental level. 

The people worshipped him fervently when they saw his powers; they believed that he would bring the world to a bright future. 

That's what people thought, but what actually happened was totally different. After being worshipped by many followers, he thought that if he merged the two different worlds, the people would be happy and cheer in joy while worshipping him.

That was when he merged the two worlds, and that's how it got its first name: Arkatra. His vision was good, but he ignored the power levels that the two worlds shared. After the merge, the only thing that happened was the massacre of his own people by horrific monsters. 

While witnessing his people hopelessly getting eaten, he decided to put up a strong barrier between the two continents, with one continent containing many species that originally lived in the old world, while the other continent contained the species from the outside world that massacred the people.

 The first continent was called Arita, and the second continent was called Unknown, which was restricted to people. 

He even sealed the five great monsters on Arita while the five great monsters were sleeping; they didn't stop producing small rank monsters, and once in a century, a high-rank monster was produced. 

Even though many changes occurred, the most strange change was that the world started spinning backwards after the merge.

 Now, after millions of years, the Arita continent has finally entered the "Age of Chaos".