Apparently if you own a free week champion you still can't obtain mastery chests in ARAM : r/leagueoflegends
GitHub - ahmj/LeagueMastery: An application that analyzes a League of Legends players champion mastery and generates suggestions based on multiple factors. This allows players to choose champions that will maximize the possibility
https://t.co/JWu57xMoFr" title="League of Legends on Twitter: "We've just published loot tables detailing the numbers and rules explaining how Hextech chests work. For more info, check out this post from Riot Cactopus ---> https://t.co/JWu57xMoFr">
https://t.co/JWu57xMoFr" title="League of Legends on Twitter: "We've just published loot tables detailing the numbers and rules explaining how Hextech chests work. For more info, check out this post from Riot Cactopus ---> https://t.co/JWu57xMoFr" />