"That sword..."
In his entire life, the Saint Knight had never seen the so-called Holy Sword. It was said that the sword was sold by the greedy royals a long time ago already. The biggest problem was that no one knew who the Sword was sold to. All they knew was that the Sword wasn't in the Empire.
According to the current Royal Family, the Holy Sword of the Arecia Empire was sold to the neighbouring Yan Empire by the Arecia Clan in exchange for some benefits. That was also the event which was used as the foundation for the revolt where the Royal Family was destroyed.
After the new Royal Family took control, they asked Yan to return the sword. Unfortunately, Yan never accepted that they even possessed the Sword. Eventually, the Arecia Empire could only give up and curse the Arecia Clan for this downfall.
Sensing the unpleasant aura, more and more Royal Knights arrived at the location. Before long, the place had less citizens and more Knights.