I believe that I have managed to find an image of the darkness. Pause or skip to 0.13 in the video, right after the hive scene. If paused correct, you should manage to get a glimpse of a character development which resembles some of the early darkness sketches. I would post a picture, but the app won't let me. As for the image, I have only one thing to say.
It's FRIKING CREEPY!!
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Appears to be a hive wizard.