[Shujin]

Well to note, since you don´t damage yourself with void stuff, they simply need to do some sort of RNG to inflict on yourself, obviously. Like really low chance on weak void stuff like Using voidgate and that evasive sill that makes you "Phase into the void briefly".
Slightly higher chance to stand inside a unstable void range and absorbing the void energy it shoots out.
Void Veil depending on how much you actually have absorbed.
etc.

I really think only the last level should be like really bad the others should be fine. ICly it would probably be the state where they are on the verge of treatable by that.