Dûran

Dûran or Andalonil was a lesser fallen Maia and Ice Spirit, who had already served Morgoth in the First Age, and Sauron since the Second Age.He was the Snagagoth (Slave Master) of Dol Guldur and when Sauron, the Mouth and Khamul were absent from Dol Guldur during the years of the watchful peace, Duran schemed to take control over the place. But the other Lieutenants allied against him and killed him in an ambush.