" Jesper: “If Pekka Rollins kills us all, I’m going to get Wylan’s ghost to teach my ghost how to play the flute just so that I can annoy the hell out of your ghost.”
Kaz: “I’ll just hire Matthias’ ghost to kick your ghost’s ass.”
Matthias: “My ghost won’t associate with your ghost. "

― Leigh Bardugo , Six of Crows (Six of Crows, #1)