There are 10 kinds of powerful eyes in this world, and they are collectively called the Holy Eyes.
When you have one of these, you can destroy the world.
Legend has it that the first generation of ten Holy Eye owners gathered together and decided to create a world in other dimensions, and they would not interfere with each other from then on.
So the ten of them created a world of eight dimensions, two of which had two holy eyes.
"Well, that's it"
Concept: story