A wagering game is conducted on a gaming machine. The wagering game includes a basic game and a special feature triggered by a start-feature outcome in the basic game. In the special feature, the machine randomly selects a plurality of outcomes and provides a payout multiplier for each of the respective outcomes. Each of the outcomes includes a plurality of symbols placed in a symbol array. The payout multiplier for each of the respective outcomes is modified (e.g., increased) based on any occurrences of a predetermined symbol among the plurality of symbols included in a preceding one of the outcomes. The machine awards payouts for the respective outcomes according to a pay table and multiplies each payout by the respective payout multiplier.