Dragon Soldier

A character from a dream I had a few weeks ago!
This fellow was a soldier for an enemy army that inherited a crystal that was once the heart of a dragon. It replaced his left eye and gave him tremendous power, but at the cost of losing control when turning into a gigantic black dragon.
He fought with a girl with cybernetic limbs and she attempted to pull the crystal out from his skull but he just started going berserk and attacking everyone indiscriminately.

it was SO DANG COOL.