Obtained: Random Loot Trophy off of most kinds of Skeletons
Uses:
Turn it in to a Mask Maker for a Skull Mask
or
It is one of the ingredients in making Brains in Skull with Spoon.
You give Ivory Crafter Skeleton's Skull.
Ivory Crafter tells you, "I hope you don't think me macabre for collecting these."
You've earned 1,000 experience.
Ivory Crafter gives you 10 Potions of Healing.
Ivory Crafter tells you, "I will give a greater reward for more unique skeleton skulls."