Night Lords are terror troops. They can subjugate a world, but they... aren't as surgical as the Luna wolves tend to be. A flaying knife, instead of a speartip, if you will.

[ He pauses once she mentions the truth, locking eyes with her and saying. ]

Of course. The Imperial Truth.
[ Or so he hopes. He's heard enough ranting about the primordial truth for three lifetimes, really. ]