This is a photo of Ender before he was matter. He was once pure energy suspended in empty space. (He jumped on top of an elevator on a deathrun map and this is the result)
You want to avoid having so many auras that it eventually boils down to "Slightly Darker Onyx Grey", but yeah, 2 new auras were added on Brinker's suggestions, but will just have to keep an eye on obvious similarities to others.