This is pretty good. I like the introduction and also the build up to the main part. I like piano part rhythm, and the notes that are being played. The piano part is what mostly make this sounds mystic.
Something else you've did well is the effects like a phaser or whatever that thing is that you've used. This is something that I have to work on. I only restrict myself to use certain ones (for the time being anyway).
Well, nothing really needs to change, but it would be a good idea to change that piano part up once in a while. It's the same throughout the whole song. The other variations you've done kinda balance it out, but the change would still be nice.
Keep it up.
Please contact me if you would like to use this in a project. We can discuss the details.