Travel to the Arathi Highlands, to the ruins of Stromgarde. Search Stromgarde for a Keepsake of Remembrance. If you find such an item, return with it to Magistrate Marduke.
The undead fear life just as the living fear death. It is not unusual for a sentient undead being to completely destroy all remnants of his or her previous life after having turned.
Unfortunately, in order to create an artifact capable of reverting Ras Frostwhisper to a mortal, we must have a keepsake from his years among the living.
You must venture to the ruined city of Stromgarde, Frostwhisper's home, and search for such an item. May luck be with you, <name>.
