The Hill of Barrow was th e focus of an ancient spirit,Featiriel-mi-Nole (S. "The Spirit that Watched in Contemplation") , a Maia , who had faded from the world of Ambar virtually beyond the ability of any living being to sense its presence . Only those who had lived in the Undying Lands (such as Gandalf or Galadriel ) or another Ainur , such as Bombadil or Mock the Trickster could communicate with the barrow-spirit at will .