Was this removed this tier? Used to reward a piece of gear. It was given by Kemora in Valdrakken.
It’s tied to the Dragonflight Dungeon Event that rotates with the other weekly events. Looking at the Wowhead calander, it looks like it cycles back around on Dec 5th. (This week is battlegrounds.)
Look for when there’s a Time Walking event going. There will be an icon with your buffs that designates what expansion is time waking that week.
Edit: Different 5 heroics sorry.