Ill teach you very quick how to make cheating dices.'
Find a dice(s)
Lets say you play a racing boardgame, ofc you would like to have the highest number. Make sure the nr 6 is on top. If you play something else you might want a combined number of 7 to play casino games.
( Do not try to switch the dices in real casinos )
Now you dont have to pay any extra for magic dices !!