A Cyclical Multiplier is a system, primarily used in the Base Game, where the multiplier repeats a clear 'Cycle' of 'Charge → Release → Reset'.
The core of this feature, unlike an 'Accumulating Multiplier' that is only maintained during free spins, is to provide a unique rhythm of enjoying the process of stacking up a multiplier over several regular spins and then unleashing its power at a decisive moment.