i was bored one night and i went into twisted tree line last night. went in as mundo, wrecked face 22/0/3. they were actually bots though. i think i was the only human
at the end i got a key even though i earned all the keys already and play mundo frequently
so basically play champs in different game modes and do well to get keys. this goes for new champs and champs you already play frequently.
How much experience do you have doing this, so that you can confirm it works? Or is it just that one bots game?
You're talking about key fragments not chests, right? Your score has no effect on whether you get a key or not. The only factors are whether you win or not (you have to win), your premade size (larger premades increase your chances), and how many you've received in the ~30 days since the last reset.
There is no limit to how many key fragments you can get on a champion, and the drop chance doesn't change with playing a different champion. You can read here for more info; https://support.riotgames.com/hc/en-us/articles/207884233-Hextech-Crafting-Guide
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/cuuOtBkZ-hextech-crafting-and-loot-qa?
