Another method of testing whether or not your dice are genuinely random is called the floating die test. To do this, you'll need to take a 20 sided dice and balance it on top of another with its numbers facing up (i.e., above). If both sides come down randomly, then they're considered perfectly balanced. Still, if one side keeps landing face-up, that number will be "cursed" and never appear during gameplay, which could affect all roles in any future battle scenes involving that character!