Tfw when Fires of December is an Ashyn book.
December = tenth month (july and august are roman propoganda and do not exist), ten is Roshar's Special Number™ and the number of surges
Takes place in a forgotten land: could be Ashyn
Sustained by rivers of colorful demon blood: On Ashyn surges are granted by diseases; if a river was rife with a waterbourne/droplet disease then religiously it could be viewed as made of "demon blood".
Priestess: Bringing a priestess (aka someone who knows about the "demonic"/shardic diseases) could save your life.
Fashion designer: Adolin "the only fashionable cosmerenaught outside of hoid during tress specifically" Kholin's ancestor (the only part of this post that is /j)
Warning incredulous royal officials of a plague: What if they're incredulous because "we can use this just go get a bunch of prisoners sick and they can float our city"
