Immune System of the Universe

Well. I kinda muddled this up too because i didn't know what colors it should be (so naturally it is rainbow), and the anatomy is bad because it is a little over a year old. It is of a species that acts as a sort of immune system, that hunts and attacks anomalies that don't belong in that particular universe. Awfully strong and mean things that propel themselves with some weird energy currents.

I'm calling them Arx right now, for lack of any better name or description for them. SO yeah. :U They will mess you up.