kostka do gry in English:

The chef diced the onion.

To dice is also to cut food up into small cubes. Cutting up a carrot into small, square pieces to put into a soup is an example of a time when you dice the carrot.

to throw / to roll the dice

He that is afraid to shake the dice will never throw a six.

We need two dice to play the game; You roll/throw the dice and whoever gets the highest score goes first.; Let's play dice.

... of a roll of dice in each round moves...