Moghlîn

Moglhîn was a Vampire of Morgoth, an ancient Umaia who had reentered the service of his former master Sauron after his return. Moglhîn lived in the crypts of Minas Morgûl or Dol Guldur when not wandering the Lands, spying, scheming and murdering for his master.Moglhîn was a skilled shapeshifter and one of his favourite tactics was to impersonate Strider, after he had found out about him.Aragorn hunted his doppelgänger for years but never actually got hold of him.