Nice thread.
I’d like to suggest void themed semi-translucent skin, where you can see the purple or blue bones inside the Void Elves arms or legs. This would show the Void Elf’s level of corruption, kind of slowly turning into something like a Void Walker.
Also a second suggestion. Instead of void transformations (such as Entropic Embrace) only being toggled upon ability usage, instead also add an idle animation for the same effect. So basically if your character was idle for a period of time, or standing still while doing non-combat related tasks, you would periodically get the visual effect of Entropic Embrace, as well as an animation such as the Void Elf looking at their shaking hands.
Since the animation or visual effect would be more common now, we could also justify adding customization options for EE in the character creation menu or barber shop.