Season of Discovery has always been about making bold changes to the World of Warcraft Classic formula, and Phase 4 is set to completely rework endgame tier sets for all classes. Whereas the original intent behind World of Warcraft Classic was about preserving and allowing players to experience the content as it used to be, Season of Discovery embraces its experimental side. New class combinations, new items, new events, and new raids have managed to breathe life into Classic servers, as World of Warcraft subscriptions are on the rise.