A gaming machine for conducting a wagering game comprises one or more wild features having a wild symbol that matches or substitutes for other symbols used in the wagering game. The game may be a slot game utilizing a plurality of rotatable reels for displaying the symbols. The game includes a pay table defining standard awards for various winning combinations of the symbols. The game may duplicate a wild symbol included in a first combination of symbols into a corresponding position of a second combination of symbols to increase a probability that the second combination of symbols is a winning combination. If the wild symbol is used to complete one of the winning combinations on the pay table, the game may randomly select a modifier to enhance the standard award for that combination. Other wild features are also disclosed.