It could swing it's sword forever, it understood not the concepts of fatigue, did it even have the proper pieces of anatomy for such a thing to happen? Nightmare simply didn't know, nor did he care, so long as he was free to use all his time to sow destruction and despair in every way possible, everything would be just fine with the world, until he decided the whole world needed a little destroying of course. Speaking of despair and destruction...
His deformed left arm punched the massive Soul Edge forward, the beast of a creature took much pleasure in hearing the very air howl in pain with each movement of the cursed blade. This sprite women, he couldn't be bothered to know her name, was just his next victim, despite his beastly appearance and fighting style, he currently happened to be going over any possible ways he could further walk all over this women, perhaps make her wish for her own death. All in due time, first to finish this paltry bit of combat, as he was very much down playing with her, he moved to finish this 'fight'.
His deformed left arm punched the massive Soul Edge forward, the beast of a creature took much pleasure in hearing the very air howl in pain with each movement of the cursed blade. This sprite women, he couldn't be bothered to know her name, was just his next victim, despite his beastly appearance and fighting style, he currently happened to be going over any possible ways he could further walk all over this women, perhaps make her wish for her own death. All in due time, first to finish this paltry bit of combat, as he was very much down playing with her, he moved to finish this 'fight'.