Idea: Skins as rewards for Champion Mastery : r/LegendsOfRuneterra
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Champion Mastery | Ninjamask Wiki | Fandom
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Champion Mastery | League of Legends Wiki | Fandom
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Champion Mastery | League of Legends Wiki | Fandom
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I got my champion mastery lvl 6 on MF! : r/MissFortuneMains
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
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