[uttwich]

You start with all 6 dice.

Whenever you have to roll a die (for whatever reason -- running away, Dungeon Casino, etc.) you have the option of sacrificing that one (i.e. removal from play)and rolling a new die in its place if you are unhappy with the first roll. Can do this once per roll opportunity. Once you get down to a single die then obviously you can't do this anymore.

Exception: If someone plays a loaded or reloaded die then you cannot discard the die and roll again.