The Five Knights of the Round Table were a force that could make anyone feel fear. In the past, when the Five Knights were at their peak, the combined strength of the five of them was enough to fight against kings and even directly suppress them.
Otherwise, the Round Table wouldn't be so active. They dared to attack the forces left behind by the kings and weren't afraid of any possible hidden forces.
It was the same for the Golden King, the Black King, and the other kings. The reason why they dared to be so arrogant and despotic was naturally because they did have the power to fight against the kings.
Even if only four of the Five Knights of the Round Table appeared, they could still fight against the kings if they joined forces. They were only slightly inferior to the real kings. If they had the Twilight Knight at his peak, they could even suppress a king.
