Inferno is the central antagonist of the Soul Calibur video game series. He is the soul of Soul Edge, the cursed sword and represents its spiritual/true form. Nightmare is it's physical form. Although no one knows when or where Inferno first appeared, it definitely exists. It took the shape of a sword in order to devour more souls and came to possess individuals to further it's unholy cause. In it's sword form, Inferno came to be known as Soul Edge. Those who held the Soul Edge were unable to escape from the curse of it's evil powers. It continued to devour in darkness the souls of those who are led astray. Although it burns fiercely with the anguish and regret of the souls it had devoured, it's blade shines with an icy gleam.