Thanks for the thoughts everyone
I'm finding approaching the illustration really difficult, I seem to have no internal vision of what i want this to look like
However I might be getting somewhere with a rough story for the illustration, whilst I originally just had him terrorising people I might give him the goal of attacking something to try and disrupt the social order
I figured that maybe some sort of organic AI (glowy green thing) that runs the cities' infrastructure could be a target for him as it would be the culmination of the human behaviour he has always be exiled from and has grown to hate.