You must complete the quests on Kerra Isle up to Need More Proof and the quests in Stonebrunt Encampment up to An Interesting Find to receive this quest.
Steps
Ghalib has sent you to look for more strange bones like the one you found in the Kejaan's Rill riverbed. You need to kill carnivores for 10 chest-drop updates (a shard of strange bone). Reported drop rates vary, however mobs known to drop these bones include: