Champion Mastery | League of Legends Wiki | Fandom
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The one champion card we get for the mastery is completely useless as the only way to upgrade champions after lvl 12 is by book of books : r/ClashRoyale
ChampionMastery.GG
Champion Mastery (Legends of Runeterra) | League of Legends Wiki | Fandom
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Champion mastery level 7
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