Nightmare

Nightmare is the living incarnation of the cursed sword, Soul Edge. Originally, Nightmare was a corrupted Siegfried, until Siegfried broke free of the sword's evil, and it took over a body of twisted souls and armor created by Zasalamel, until Soul Edge was destroyed.

When Soul Edge was reconstructed by its followers, it formed a new body, named itself "Dumas" and became part of the inner circle of Rudolf II of the Holy Roman Empire. From this position of power, Dumas sent his servants to find the remaining pieces of Soul Edge. A mission in which they succeed, and Nightmare is reborn...

Video Game Villains
Nightmare was eliminated by Bowser in the first round

3D Fighters
In the first round, Nightmare was defeated by Captain America.