In the Silversky Palace, find Menark (he is near the Palace Dungeon entrance). Say Study and he will ask for a skeleton bone and a mummy bandage.
You can find the Skeleton Bone from Skeleton Warlocks (outside the Broken One Caves for instance) and the Mummy Bandages from Bandaged Horrors (in the RD Crypt).
Gather the ingredients and say Study and then Yes.
Gain :