In accordance with some embodiments, a game mechanic for an electronic game (e.g., a reel-based slot machine type game) which includes a cascade feature provides for a block of symbol(s) to be moved into and out of a game interface. The block of symbol(s) is moved or manipulated as a single unit and may be stepped into and/or out of the game interface over a course of a plurality of game events (e.g., cascades or spins of the game). The block of symbol(s) may, in some embodiments, comprise at least one symbol which spans a plurality of symbol positions of a symbol matrix when the entirety of it is placed into the symbol matrix. In some embodiments, the block of symbol(s) may function as at least one wild symbol.