first, give him steampunk goggles, and make his lower mouth end in a astartes-type gasmask. give him a old peperbox style revolver, and make it covered in blood. and for good measure, give him a holy Bibel. then add more rust, and make one of his ears robotic and broken. remove pieces of armor, and put bullet holes on his body. add scars, and stain some parts of his fur with blood. now you got a steampunk nightmare.