No credit to me, just changed the IDs of the NPC the aura looks for the Relic Gatherer/Gorger while questing in Korthia.
Adds an Arrow and plays a Thunder sound.
Same as the Algan detector in Nazjatar :)
EDIT: As I've been asked a few times now.
This Weakaura will only work on Gatherers and Gorgers *not* the normal purple mobs.
The range of this aura is LESS than that of the original Algan WeakAura due to the fact the Korthia mob doesn't have any spells associated with it (AFAIK).
Therefore the range is limited to when the nameplate appears on your screen. This is notably less than the range you can see the purple aura maphack around the mob in the world.