i like the idea of an ash-covered landscape and the first two warplight mutations are spooky. probably could have found a way to explain weather, ashrot, and warplight into fewer pages. it would be great to use that space for dungeon maps of the tower, citadel, and library. even more important might be the inclusion of some factions to help show the story and offer some alternative routes. the knaves may wish to try you on that "no escape" thing if they can't see others drowning or rebuffed by a big wall. some good ideas here that would benefit from some additional time.