[Mivereous]

I know this suggestion isn't going to be like due to people wanting to RP skills as other things, but...

Add Void Poisoning as a type of wound. It could vary by it's application (maybe Open Wound from Cutthroat, Internal or Pathogen or both from Black Bolt, Blotch could apply Skin Damage to yourself or the enemy depending on who it is applied to, etc etc). It doesn't have to be immediate. Something like, if the skill is used on your more than twice within 5 turns? I dunno. And a minor case could give you a slight boost to RES and FP, but a severe case would affect some stats negatively. Time not using Void skills could eventually settle minor cases, but who knows what would happen with the more severe cases...

I don't really know how to present this idea, but I'm sure there's a way it could be thought of to some use.