Blood War

The mix of genres creates a unique world, but I'm curious whether this was planned from the start or evolved during writing. How did the author decide on this combination?

The characters seem to operate in shades of gray, which kept me guessing about their true motives. Did this complexity surprise others as much as it did me?

Every faction and supernatural rule seems deliberate, which made the universe feel so lived-in. I wonder if there was a detailed lore bible behind the scenes or if it grew naturally.