Hextech crafting
Now for me I usually play solo Q because most of my friends are kind of trash or they bring in too high skill tier people for me to even compete with. I know in groups you earn mor chests frequently but I can never seem to get a good enough team or score in a group to get a chest or key. But when I solo Q I went like 11/3/5 as TF and got a quad and after 4 more games like that still nothing. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2121719509/229540146?tab=overview