Kill Shin`Ree avengers outside of Wailing Caves around ( -247, -48, -854 ) /waypoint -247, -48, -854.
Harvest 5 blood-stained finger bones that drop from the orcs upon their death.
These bones do not drop from a chest, corpse nor are they auto-updated - they are gathered from the ground. Furthermore, the bones do not drop from every orc skeleton and are very tiny. If you are having trouble seeing them, zoom your camera in.