Goals? Well, we both know he wants to surpass God. Hmm, it could be, trying to wipe out the "good" humans in order to create a race of humans that only pledge to him. Without faith, won't angels fall?
Or he could be trying to bring "hell on earth" just as a second home or something.
*thinks*
Mary could probably go on a whim amd attack his eyes, not knowing that he'd be temporarily defeated. He'll be blinded, but maybe he'll have some 6th scent to know where he escapes to. More than likely the black sand.