Aethril

Just like the Foxflower, when you are collecting an Aethril there is a chance a Withered Hungerer will spawn a drop some more Aethril. The best place to farm Aethril is Azsuna along the road around Narthalas Academy. Have a look at the map below for the route to farm Aethril quickly.

Hope this route helped you with where to farm Aethril in WoW!