You give Ivory Crafter Undead Thighbone.
Ivory Crafter tells you, "A thighbone... hmmm, not a Dark Revenant, but I can still use it."
You've earned 2,000 experience.
Ivory Crafter gives you 3,000 Pyreals.
Ivory Crafter tells you, "Bring me a Dark Revenant thighbone I will reward you fivefold."