Probably not your usual horse.
Started out as a deer/horse/dragon mix thing but ended up as a horse, however that drawing was too boring so I changed it back and added some really saturated colour. Took way too long though, like 6-7 hours. Process below!
Full size image: here.

Initial sketch

Refined sketch. This step took an hour or two..

Started adding the colour. Went with a dark black.

More colouring

Moar light

Some highlights

Aaand done! (I skipped a few steps). I also decreased the amount of highlights on the body in the final drawing. You’ll see it if you compare this one to the final piece.