Seriously? I don't upgrade my heroes's stars each day, maybe once very couple weeks, if I feel lucky. I do however buy stars everytime they pop up in the fair or lab, as that, when my stars do fail, I have enough to bring the hero back up to the level it was before the failure. I know a lot of people also doing it this way. You don't need to buy stars for 10 gems a star when you can get away with them for so much cheaper in the fair and arena.



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