We had an update to the upcoming Turbulent Timeways Timewalking event coming on June 16th. Blizzard have changed the Mastery of the Timeways buff, removing the account-wide part, which they originally stated it had. The original article has been updated with the new terminology. So, alt leveling is going to be the same as the last event.
Time to Buff Up
Those who run any Timewalking dungeon during the event get the “Knowledge of the Timeways” buff, granting a 5% increase to experience when killing monsters and completing quests.
Completing Timewalking dungeons increases the effect and extends its duration. This is a stacking buff, and after four applications, it transforms into “Mastery of the Timeways,” increasing the experience gained from killing monsters and completing quests to 30%, and persists through death.