Abstract: There is provided a gaming system and methods that utilize a presentation assembly configured to present a series of spins of a plurality of reels arranged in an array, the array including a subset of the array in which weights are assigned to the symbols within the subset. Determination of winning combinations of the symbols in the array is based, in part, on the weights assigned to the symbols. If any wins occur as the result of a spin, the wins are paid, the winning combinations are removed, and the array shifts to fill in the removed symbols. The subset of the array is randomly repositioned and resized, and weights are added to one or more symbols in the new subset of the array. Any newly resulting wins are paid, and the process repeats until no wins occur, at which point the spin ends.