Billiard Stand-In

Suddenly there is a game called billiards in the world. The rules are that various countries or alien homes send a representative or randomly draw people. The winning country will get rich rewards. The losing country will lose a little luck. Each country has 10 points of luck. 10 Points of luck. The country will disappear directly. It also has a magical power called a substitute. Representatives of each country can also have a substitute.