I've devoted my life to perfecting my elixirs.  Despite my success, I haven't been able to create an elixir of eternal life.$B$BI think I know the reagent I'm missing.  I've heard of a place called the Caverns of Time in Azeroth where intruders known as rift lords and rift keepers phase in and out of the timeline.$B$BThis intrusive time-shifting creates tears in time itself, twisting it infinitely into crystallized essences.  Bring these to me along with samples of your work and I'll teach you all I know.