What did early draft introduce ?
Wagner worked backwards from planning an opera about Siegfried 's death , then deciding he needed another opera to tell of Siegfried 's youth , then deciding he needed to tell the tale of Siegfried 's conception and of Brünnhilde 's attempts to save Siegfried 's parents , and finally deciding he also needed a prelude that told of the original theft of the Rheingold and the creation of the ring .