One of the new events in Patch 10.1.5 Fractures in Time are Time Rifts, a new World Event in the Dragon Isles in which players go through time-displaced portals and revive old events as we fix the timeways.
Unravel the Time Streams
Join Together for Time RiftsThe time streams have become a bit more unstable with recent events and as the boundaries between the timelines weaken, minions from other timelines have begun making their way into Azeroth.