Could you help me out and tell me what a Knight of Void is like/is capable of?
Whew, okay, so someone who Serves Nothing to others may be kind of a weird Knight right? Helping others through inaction? We know Horuss mentions no one having ever served him anything, and how he came to all his conclusions about himself with deep introspection, so it’s fair to say a Knight of Void could not Serve anything to others and remain out of their friends’ affairs entirely.
Alternatively though, they may use the power of the Horrorterrors to help those in need, perhaps at risk of becoming controlled by them. Or maybe they serve Lies to shield others from the harsh truth? Hell- They may use ‘nothing’ to Serve, as in, they fight with no weapon, no armor, just them and their determination.
So yeah, as with so many things with Void, there’s a big duality there.