[@HeroicSociopath]

I see you have started work on you CS, and I will just go ahead and mention that the power is probably to strong. If you just want the astral projection part of power, that would be fine, in fact you probably could fit something else in with it. 

However, the possession thing is interesting, but if you go down that route, you are probably not also going to be able to have astral projection with it, and it will probably need strict limitations.