For ten points, name this Norse hero of the Volsung saga, who slays Fafnir the dragon and marries Brynhild.
This man's granddaughter married Ermanaric, King of the Goths, and was trampled to death by horses for committing adultery. This man found a wife for one of the sons of Gjuki by riding a horse through a ring of fire. Grimhild erases this figure's memory, after which this figure marries Gudrun. This man tested his most famous weapon  by seeing if it could cut through an anvil, and after this man gains the ability to understand birds, he slays his villainous foster father. This man's horse is a descendant of Sleipnir named Grani, and his sword is Gram. For ten points, name this Norse hero of the Volsung saga, who slays Fafnir the dragon and marries Brynhild.
This man's granddaughter married Ermanaric, King of the Goths, and was trampled to death by horses for committing adultery.
{Sigurd} [prompt on “the {noble hart}”]