Patent ID: 8721428

Claim:
A gaming machine for playing a wagering game with a set of symbols, and wherein the set of symbols is dynamic, the gaming machine comprising: a display having a plurality of display positions; and a game controller configured to provide a wagering game when a wager is staked on an outcome of the wagering game, to select symbols from the set of symbols, to display the selected symbols in the display positions of the display to form an outcome, and to award a prize when the displayed selected symbols includes a winning combination of symbols, and wherein said game controller being configured 1) to select at least two of the symbols sequentially, 2) to change at least two symbols of the set of symbols between at least two sequential symbol selections depending on a characteristic of a single symbol selected in the first of the at least two sequential symbol selections before the second of the at least two sequential symbol selections, and 3) to display the at least two sequentially selected symbols in vertically adjacent display positions.