Ice Kingdom

A Mystery Symbol is a surprise feature where symbols appear on the reels with their identities hidden, and after the spin stops, all mystery symbols on the screen simultaneously transform into one single, identical symbol. The core of this feature is to provide players with dramatic tension and anticipation of "what symbol will it be?" until the moment the result is revealed, and the thrill of a reversal where, depending on the outcome, an ordinary spin can be turned into a moment of huge payouts.

A Symbol-Specific Multiplier is a special system where the multiplier applied to winnings is not applied universally to all winning combinations, but is instead applied only to a single 'target symbol' type that is randomly designated for each spin. The core of this feature is to create a new 'protagonist symbol' on every spin to maximize unpredictability, and to create an unimaginable 'big hit' if the designated target symbol happens to land a win with a high multiplier.