These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Brilliance: Lemex catches fever and dies just as Vivenna reaches him, resulting in the fortunate passing on of his Breath to her. The timing of the death is a large coincidence that slightly strains suspension of disbelief. However, the truth is that Denth is responsible for the death and the timing, revealed with his sudden betrayal.
Magnificent Bastard: Denth. Not only does he have Vivenna (and the reader) convinced he's a good guy for the first half of the novel, he's also the driving force behind destabilizing Hallandren from with in and is Dangerously Genre Savvy.
Vasher [quietly]: Torturing me won't bring her back.
Denth [turning, the moonlight glinting on his blade]: No. It won't.
Squick: Per Word of God, Clod the Lifeless was once Arsteel. Denth's teammate Jewels was once in love with Arsteel. Now that he's a Lifeless, she still sometimes sleeps with him. Yeah, Denth's team all have issues.
The Dog Was the Mastermind: The foreshadowing that the Pahn Kahl are behind everything is very subtle; not much information is given about them, so it feels like The Reveal comes out of nowhere.