Found inside Loth’na Caverns Dungeon Delve. This Delve is found in northwestern Craglorn, just southeast of Trial: Sanctum Ophidia.
Soloable: Yes (only one/two groups on your way to the shard).
Once you enter the delve you should pass by the first group of veteran level 13 creatures. Keep to your left. Soon enough you come across a small wooden bridge. You don’t want to cross the small river here as there is a group of creatures defending the bridge. Follow the river upstream. Cross the river and collect the Shard.
Dungeon Delve Entrance.
Loth’na Caverns Entrance Map Location.