Bungie has introduced every created enemy so far except for one. The name is unknown so I refer to it as the Black Mist. It was shown in a concept along with the other official foes along with all their names; fallen, vex, hive etc. but when it came to the art of this Mist it only showed a "?"... this is very interesting. Only one other thing has been kept hush-hush in a similar fashion and that is the Black "Pyramid Ships." I'm starting to believe they have something in common. If you watch Bungie's newest Destiny Community Thank You video (Link provided), you will see a glimpse of the Black Mist @ 1:35. I will continue to look into this unknown enemy and keep you all informed. follow me to keep up with the progress. Also if anyone has anything to add then feel free to inform of your discovery. Be Brave, Reign, born of shadows