Card Mastery in Clash Royale is a series of challenges for each card. Completing these challenges rewards gems, gold, extra copies of the card, as well as wild cards. The challenges come in different ...
Supercell has implemented a significant change to the Clash Royale Card Mastery rewards system on June 17, 2025. It changes the way you collect and store Gems in the game through a major shift in ...
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