Wotan wants to steal the gold from the Nibelungen.
The Valkyries are warrior maidens conceived to collect the souls of the heroes killed in battle to bring them to their rest eternal in the Walhalla.
Siegfried needs a sword to kill the dragon Fafner and get the magic ring he guards.
Ragnarok, in Norse mythology, refers to a war prophesied of the gods that brings with it the end of the world.
