For thousands of years, as long as Sandrasku has been a prison city, the King of Sandrasku has been a revolving door of the strongest and best warriors in prison. It has always been a law in the city that anyone can challenge at any time for the throne. The King picks the weapons, which gives each King of Sandrasku a good chance of keeping the throne (and his head), but still, challengers do win it frequently. The current King is King Kroc.
Battles take place in the Sandrasku Arena and it is the only time outsiders are allowed into the city to watch the challenge for the throne.