So, stupid me forgot to stock up on Nosferatus in Chapter 17 and now I only have the one that Knoll came with, plus, I missed the Lyon one.
Anyway, I checked that I could obtain it in Valni and Lagdou (Thank god :D ) but I was wondering when the contents inside the chests are "set" because I'm thinking of continuously wasting RN's in the floor before to change the contents if that is possible.