Talk:Experience Tonic/@comment-30197405-20170101023352/@comment-28184036-20170105030531

Same way as xp tokens but only in summoner quest mode, on the screen where you have a choice to quest repeat, manage squad, begin quest, manage items and next to manage items booster items, and from there you can activate your tonic, I highly reccomend using it after saving up 4000 STP so you can farm summoner lab for max effect (for anything other than elemental mastery)