Very insprational this strange mask. When it is a Sith Lord I woould think of a reptile based creature. Of course evolved in such a way that it can walk on 2 legs, but still has the basic way to run on all 4. Of course possibility to run upside down. Hands are bigger than usual and in both legs there is a hidden spike (odd formed too). Outfit greenish colours but of course black hood. No extra long sleeves, but underarms still partly visible. On short gloves are short spikes. Special power can float in the air. Ligthsabre of course waterproof and is used like a long dagger.