Legend

Test your SKILL and add 2, if you succeed, then you managed to change the dice and you will automatically (No need to roll)

You may bet up to 50 Gold and play up to three times.

If not then you fumble around with the dice dropping them and don't get to do the exchange. You also look pretty suspicious and you beat a hasty retreat before anyone can call the guards. (You lose your loaded dice as well)