I have been playing Love Live School Idol Festival All Stars (SIFAS) for the past couple of months. SIFAS is a mobile rhythm game where players build teams composed of cards and tap notes during songs to get high scores. These cards have different skills, attributes and stats and come in different rarities. R (rare) cards are common but weak while SR (super rare) and UR (ultra rare) cards are rarer but more powerful. These cards can be picked up (or pulled) by gacha, where a player spends Star Gems, the in-game currency, to receive random cards. Rate-up cards are new cards added to the gacha that initially receive a slightly increased chance of pulling them for a limited period of time.

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