I just beat it on Hard, and I now have the option to play as "The Legenday Dark Knight", but I don't know if it is worth it? I wonder if he can use Sparda's Devil Mode after getting the sword?

I can't find any walkthroughs or guides that talk about the skills of the Dark Knight. He doesn't use Ebony and Ivory, and he starts with more than just the Force Edge. Its some other sword that he weilds..

I'll probably just beat Dante Must Die mode now and check out what the game is like in Devil Mode the whole time.