Brogue - The Unidentified Scrawls

The board game that i've been like, on enough working on for a couple years. And it's a hard game, but a lot of feedback i get is like, we actually want be harder,. We like when this very unexpected, like weird type of hard comes up and kills us - even if it ends the game. Heres was carious. If you could just explain how scroll system works, and then how you arrived there. Thanks.