 Though Siegfried temporarily regained his sanity, he became possessed again shortly after, as did Soul Calibur, which succumbed to the darkness of Inferno.Four years later, Nightmare had begun on his Soul Edge ritual again in his old castle, wanting to resurrect Soul Edge, but his ritual was interrupted by an exiled French nobleman, Raphael Sorel.Although Raphael was utterly defeated, he was able to penetrate Soul Edge, which gave Siegfried and Soul Calibur the time to break free of its control fully.