could a Mage of Void know how to use Horrorterrors to their advantage or like slightly manipulate shadows to attack or cloak themselves and their attacks (ex they shoot an arrow but it's invisible until a bunch of arrows are shot into your back) they can't be hit as they have shadows engulf them and you until you're standing in a Void just being constantly assaulted by attacks you can't see coming. how plausible is this?

I like the concept! I could see that.