Because of the initially hidden identity of the stone-mason, and the fact that he is completely destroyed once his identity is unmasked, "The Walling of Asgard"is also an example of a "Name of the Helper Legend." In these legends, a mysterious stranger helps the hero accomplish a task in exchange for something very dear, but is defeated when the hero learns his identity. The most famous of these legends is "Rumpelstiltskin."