power help?

hello! basically im looking for a way to recreate tokoyami's dark shadow quirk as best as i can in the bob universe?
i was originally planning on using shadow manipulation, but i think it got taken out of the store. i also have a few other ideas, though:
- using an elemental such as earth or fire and using it to act in much the same way dark shadow did in the show (if i go with fire the flames would probably be black, i was wondering if that was possible for any of the other elementals though? cause the idea of dark shadow becoming an earth elemental power is really appealing but i want to know if i can uhhh change the color of the earth i guess. if not thats fine)
- making dark shadow a ghost character (for this one i was wondering if ghosts could be tangible? i dont think so though which is why im iffy on it, plus idk if tokoyami would need a power to see it)
- using shadow manipulation? if it's still an option / going to be an option in the future?
- dark shadow is now a physically different character that is alive and exists but tokoyami and dark shadow are soul bonded (this would probably be a last resort situation though)
- uhhh other

i would really appreciate some help on this :'- ) i know it's probably impossible to recreate his quirk exactly which is fine! but the main things id like to preserve abt it are:
- using it for combat
- it can appear and disappear on command