Question: The Albatros L 79 Kobold was a single-seat German aerobatic aircraft of the 1920s and 1930s, the kobold (occasionally cobold) is which type of entity, stemming from Germanic mythology, and surviving into modern times in German folklore?
Sentence (from "King Goldemar"): He has long, silver hair and beard and wears a crown and a purple mantle.
Relevant evidence: No