I'm quite enamored with Ostalin's existence in the WotBS adventure path. It's not too often you see a setting that includes a region that allows Xianxia to co-exist with the Fantasy genre, and I find it a fascinating combination.
For those unfamiliar with Xianxia, it's basically the Chinese...
Thanks for the great work, Tormyr. My group still hasn't run through the first book, but I'll definitely pick this up once I get a better idea of how I want to take them through the world.