LucienVox

-goddess, lesser deities, and Devas
-yes power corrupts, it just that shadow has a lot of it which most tend to fall into it. which is why i made that comparison, you need to have a strong will. 
-because atmosphere can also be a vacuum. posion is a medium.
-Aether is one aspect, as is dark matter is another.
-yes that's why listed sonics(air), and vibrations(solid/liquid) as Sound.
-yes. Yes they are, but do you really want to discriminate against fungi relatively being cousins to plants? 

sure, that's alright.

hehe thanks

- holy meaning divine, in which in most contexts means scarred, blessed, sanctity.
-shadow is more destructive because of its nature to corrupt, or stain those exposed to it, you need to have a will of titanium to resist the corruption.
-Aero is Atmosphere, atmosphere is any gaseous envelope or medium. i split it from air sense it can also relate to poisonous, and other relate gases.
-Cosmic in this sense deals in dimensions beyond matter, yes i was aware of gravity in that regard, but i gave it to earth because of its dealing gravity is proportional mass
-they are alike but different in regards Sonics are vocal and pass though the medium of Air, where as vibration pass though solid and liquid forms.
-not all plants have roots, like Mushrooms, moss, liverworts, algae, seaweed don't have roots, i included roots as well because roots are strong and structural foundations for other plants, that even if a leaves and stems wither so long as the roots remain, then things can regrow, they also can be brewed into remedies and cures NOTE: most cures are made from poisons to fight other poisons, which sounds crazy but it has been done.
-AND yes you are correct, however wanted a particular name for the element so i took Astra as from the astral plane to emphasize the connection to there in with the mind, but yes it is basically Psionic.

Nether is basically negative energy which is like death, or anti-life energy. Its oppisite is Astra, or aether is positive life energy, basically the essence if life. Both deal with with body and soul.