National Games Arena.
This is the most mysterious and future-determining rule since mankind entered the Christian era.
Every century or twelve years, the national luck tool of various countries around the world now acts as a "guardian", representing a country's destiny, heritage and future potential, competing on the stage. The winner will have a prosperous country, good weather and good science and technology in the next twelve years. For those who lose, the fate of the country will suffer, ranging from frequent natural disasters to frequent changes in ownership of mountains and rivers.
