There is provided a gaming system, gaming machine, and method that utilize a presentation assembly configured to present a plurality of reels, an array, and an indicator. The plurality of reels bear a plurality of symbols. Game-logic circuitry is configured to spin and stop the plurality of reels to land symbols from the plurality of symbols in the array. In response to the landed symbols including one or more catalyst symbols and one or more value-bearing symbols, a multiplier is determined based on a number and locations of the catalyst symbols in the array. The multiplier is displayed in the indicator. An award is provided based on the multiplier applied to values borne by the value-bearing symbols.