Hey thanks guys!
Just doing a bit of detail to the horse concept now. This is what I have so far. I will let this part rest for a couple days now until I get the main character worked out. Also I have started doing some basic thumbnails for the composition of the final illustration but they are extreamly wip and I will wait until i get some more solid ideas for composition.
Right now the story for the final composition is this:
Its getting very close to the end of the final battle with the machine army. My character runs over to a teamate to heal his major injuries. He is covered in sweat and blood and tries his hardest to save a close friend when all of a sudden a few machines spring out of the ground and head for the horse . While healing his friend he tries to use his rock powers to distroy the enemies before they attack and possibly kill his partner.
Heres the concept for the horse so far

Cheers!