Season 62015 -

The old mastery system was overhauled to include powerful "Keystones," such as Thunderlord’s Decree and Grasp of the Undying , which significantly impacted champion power spikes. 2. Major Features and Innovations

This was the first time players could earn skins and other cosmetic content for free through gameplay. Season 62015

Due to the persistent "bitching" and dissatisfaction, Riot Games eventually acknowledged it as a failure and reinstated Solo/Duo Queue for the following season. 4. Meta and Champion Diversity The old mastery system was overhauled to include

Major reworks were applied to several ADCs to give them unique identities. Notable changes included Graves receiving his "shotgun" mechanic and Quinn gaining extreme mobility with Behind Enemy Lines . Season 62015