Patent ID: 8096868

Claim:
A method for conducting a wagering game, comprising: as part of resolving a single wager, determining a spin result, the spin result including a set of symbols positioned in a plurality of rows of symbol positions; displaying the spin result on a viewable display area; awarding a prize associated with the spin result; responsive to a first trigger condition being met, adding a row to produce a second larger plurality of rows of symbol positions for at least a second spin during the single wager, the second larger plurality of rows of symbols positions including the plurality of rows of symbol positions, and decreasing the prize value, determining a second spin result for each symbol position in the larger plurality of rows of symbol positions, and displaying the second spin result on the viewable display area, responsive to a second trigger condition being met, removing the row of symbol positions for at least a subsequent spin during the single wager, and increasing the prize value; and ending the wagering game if there are no rows of symbol positions remaining.