Well first, this is a very detailled piece mate.. I'm impressed ^^

There are however a few things that I would either leave out, or alter to make this piece even better.
For instance the lava/magma stock you used on the 'egg', where the immortal is coming out of, I'd remove that. Because the egg/rock itsself has enough details already and the lava texture is just in the way.

Also the light on the immortal is a bit distracting. I'd personally just make the light less big you know, it's taking up a lot of the details you have on the immortal, and making him less 'out there'.

I have to say I love the effects you've done with the rock/egg, that it really looks like it just landed and the immortal "flew" out of there, very nicely done!

And perhaps.. Just work a bit more on the sky itsself, the colours aren't really smooth to my opinion and it just gives off this 'chaotic' vibe.

Everything else is really great, you've done an amazing job on this one mate!