The only thing he's lacking is interesting markings. His design is very boring, although he does have the potential for 'bone markings' on his children - see Kid, Sabre and Zhu for examples (dark's thread here has images of them all), as well as his twin Nymeria and mother Confutatis who both have more defined skull markings :D
[ you can't stray from what you are, you're the closest thing to hell i've seen so far ]
[ use of force/magic on him is permitted aside from death/maiming ]