With his allies either defeated or missing, Nightmare confronted Kilik and Xianghua and was ultimately defeated, later falling into the collapsing void where they fought.

But during the ritual to restore Soul Edge, Ostrheinsburg Castle was assaulted by Kilik, Maxi, and Chai Xianghua. As his and other character's profiles explain, he formed a group ' Schwarzstrom' with Astaroth, Isabella 'Ivy' Valentine and Aeon Calcos (the Lizardman) in an attempt to speed the gathering of souls and restoration of the sword's power. Nightmare's incarnation in Soulcalibur II remains mostly the same, with minor upgrades to his fighting style, mainly on his stance. Unaware that it was a trick to restore the sword's power, Siegfried agreed and started a killing spree which eventually made him weak to Soul Edge's will. After that, the sword spoke to him, promising the resurrection of his dead father if he helped it gather souls. Nightmare's profile on the game explained how Siegfried obtained Soul Edge after a fierce fight against its former owner, the dread pirate Cervantes de Leon and the fiery demon that spawned within it afterward, Inferno. Siegfried was later added to the cast as a time-release character and inherited the same style with minor changes. Nightmare was a starting character whose style resembled Siegfried's former moveset. He now wields his own version of Soul Edge, sporting a single eye on its blade, something that would become the trademark of the various versions of the weapon, and the creations made from it, such as Charade. Despite the Nightmare Arm only having three large fingers, it didn't seem to hinder his combat abilities at all. Siegfried's body was slowly being mutated by the sword's terrible power, causing his right arm to morph into a hideous claw. This was also the first appearance of the Nightmare Arm. His red armour was changed to a dark blue armor and its design turned more metallic instead of fleshy.

In Soulcalibur, the concept was expanded and turned into an official character, though with changes to the design. Oddly, he uses the same voice actor as Siegfried. He has no story nor ending, and only used Siegfried's Soul Edge without effects. This early version was very different from the current Nightmare, having crimson-red armor and a more flesh-like design with no mutated Nightmare Arm. Siegfried! was an alternate version of normal Siegfried taken from his no-input ending, in which he is consumed by Soul Edge. Prior to Nightmare's full debut in Soulcalibur, an extra character named Siegfried! was added as an unlockable character in the home version of Soul Edge. Nightmare, known as Siegfried! in Soul Edge (Soul Blade).

Nightmare soul calibur pepakura files