After watching the last dev stream, there was a question about having an analog to elemental resistances for the group of poison, necrotic and void and what it should be called.
I think nefarious could be a name for it. I would also like to see not just the resistances, but for damage as well, since we have elemental damage we could have nefarious damage (lich might be a candidate for this, similar how sorceress is for elemental).