Sources of horror: old-city taboos, folk rules for dealing with the supernatural, schemes hatched by the living, uncanny memory tricks, and everyday details that become terrifying when you think them through
Combat styles: contests of rules, cryptic strokes that break taboos, close-quarters fights against the supernatural, overwhelming intelligence, and risking your life at a price
Atmosphere: oppressive, chilling, suffocating, scarier the more you read, yet the more frightened you get, the more you want to read