Rito I cri
I got an S- but only got +221 mastery score. We lost the game. I thought it was about how well you did with the champion, not whether or not you win or lose. Cause i bet if we had won, I would've gotten like +1000 or so. Here's the link to the game http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2050907971/50550618?tab=overview.