I wonder if the appearance is related to the
[Beginner's Guide to Dimensional Rifting] toy somehow?
This also unlocks at Revered rep with Court of Farondis just like the Boon of the Gemfinder that the guy has showing on his achievement history.
The achievement lists 7 different locations, so maybe one of them has something related to the artifact?
I checked the locations of the book on WoWHead and I don't see any waypoint near Faronaar, but maybe there's ~something~ that only demon hunters can trigger?
I'm just guessing at this point, but I'll continue using the item every 4 hours and checking the locations with spectral sight and see if anything interesting happens.
Next time I'll try using this item from Suramar since there's a lot of teleporting around in the zone.