Online simulator for mastery of Season 4: finally finished
For someday circulates in the network simulator for the new mastery of season 4 made by a player of League of Legends.
After several update finally this interesting tool has been completed, then you can already use it to test a preview of the effects of mastery on our new champion.
If you are interested, here is the link: League of Legends Pre-Season 4 Mastery Calculator