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Masters will get better overtime as more content rolls in, but with how stingy the game is with gems there isn't much reason to grind if you don't whale or get lucky with pulls.
An easy solution would be to give out free characters that are good but not as popular nor as powerful as the ones you have to roll for
>Cynthia event with a new banner
>She's broken and tier 0
>You also get a tier 1 Ace Trainer for completing some missions
