Hi Harry,
Welcome to CGtalk 
A promising start so far. The composition works well and leads the eye in the right direction.
I like the energy thing, suggests some kind of entity reaching out, reminds me a little of the film Mist. However on a technical note, this probably wouldn’t be apart of a matte painting, but added later in compositing.
The branches are well composed but maybe a little harsh in contrast, also the lighting is coming in from the wrong direction when compared to the lighting on the mountains.
The mist in the bottom right, should be behind the trees … looks like you’re trying to conceal the other trees … can still see the depth issue.
Over all perhaps a little too blue. Need to pull back some of the original colours, especially in the foreground to the right when the light should be hitting more.
Hope that helps a little, again; a good start 
Dave.