A slot game may assign a multiplier value to a stacked reel having an outcome including a stack of special symbols or wild symbols. The assigned multiplier value may be selected based on a random game outcome of preceding reels. The slot game may display the stacked reel with the assigned multiplier value or by replacing the stack of special symbols with a single symbol and the assigned multiplier value. The slot game may display a merged multiplier value over adjacent stacked reels, the merged multiplier value being the product of the assigned multiplier values for each of the adjacent stacked reels.