Skyrim: Culling the Beast
Culling the Beast is a side quest in Skyrim: Dawnguard.
Culling the Beast is only available to the Vampire Lords faction.
 Starting Location
Culling the Beast begins in Castle Volkihar
 Quest Giver
Culling the Beast is a quest given by Feran Sadri.
Kill the Master Vampire at (Random Location)
 Possible Locations
Go to the dungeon mentioned in your quest log, and kill the Master Vampire
Potion of Blood (3)