Hades had become King of the Kronos Kingdom, but the news had not spread far across the world.
The Kingdom developed steadily, and the forces of the Pluton Pirates gradually came together as a whole.
The Pirates and the Kingdom's military had fully combined their strength.
An army of two hundred thousand guarded the Pluton Sea, a region made up of islands occupied by the Pluton Pirates.
Within the Pluton Sea lay a large island named Paros Island.
Five months earlier, the Kronos Kingdom had sent large numbers of workers, designers, and even Devil Fruit Users to the island.
It was the most important island in the Pluton Sea.
A vast tract of land had been set aside at its center. There, the Kronos Kingdom would build an enormous, magnificent structure.
Hades had conceived the idea long ago: a colossal pyramid-like building. Some called it the "Battle Pyramid," but he preferred "Sky Arena."
It would be a super-sized arena, and Hades expected it to be a tremendous moneymaker.
The entire structure needed to be strong enough to withstand the damage powerful fighters could inflict without breaking easily.
For that reason, it would be built almost entirely from rare, hard materials. Even a fighter on the level of a Marine Headquarters Vice Admiral would struggle to damage it.
Building the arena would demand vast amounts of labor, materials, and, above all, money.
But given the Kronos Kingdom's current strength, enormous population, and the Royal Family's control over the Kingdom, none of that posed a serious problem.
The Kronos Kingdom was not short of money. What it needed was a way to make that money grow.
The initial budget for Sky Arena alone was one hundred billion Beli.
Most of that would go toward rare ores, though Sky Arena would also incorporate