[quote=@Altered Tundra]
<Snipped quote by BlackSam3091>

Things like conjuring up shadow tendrils, being able to fade into the shadows and transport through said shadows. I was thinking something along the lines of the Nara Clan from Naruto but a little more advanced and wide-spread.
[/quote]

I have to agree with Mr Allen J, technically darkness manipulation is the manipulation of nothing. The above sounds very 'anime'-esque which is a feel I'm definitely trying to avoid. I should also forewarn you I have a certain dislike towards most standard interpretations of darkness manipulation so you're going to have a tough sell on your hands if you do go the quoted route.