Dice or a die, through the play on words, is a way of taking chances, which, in the spiritual sense, may be irrevocable and may lead to a 'death'- perhaps of an opportunity, for instance. If someone else is rolling the dice, we are leaving our fate in the hands of other people and must, therefore, consider whether we should run our lives according to their rules. To be playing with dice in a dream emphasizes the fact that we are playing with fate or taking chances in life, which we really ought to be considering more carefully. You may also like to consult the entries for Games and Gambling.