Patent attributes
A method for conducting a wagering game comprises receiving a wager and displaying a randomly selected outcome, the randomly selected outcome comprising a plurality of symbols arranged in an array. The array comprises a plurality of symbol positions, the plurality of symbols occupying the symbol positions. Each of the plurality of symbols is selected from a set of available symbols, the set of available symbols including a plurality of standard symbols and at least one mystery symbol. The method further comprises detecting the presence of the at least one mystery symbol in at least one of the symbol positions in the array and randomly selecting one replacement symbol from the plurality of standard symbols. The method further comprises replacing all occurrences of the at least one mystery symbol in the array with the replacement symbol to create a modified array and evaluating the modified array for winning combinations of standard symbols in accordance with a pay table of the wagering game.