Ghosts, walking dead, mist barriers, otherworldly spaces—these things aren't unusual, especially for those of us who've seen weirder stuff. The only unusual aspect is their massive occurrence on Earth.
The cause of supernatural phenomena remains unexplained, or rather, there are so many explanations it's impossible to pin down. The research center is the pinnacle of Empire Technology Power, where any researcher can recreate the paranormal incidents happening all over the city in hundreds or even thousands of ways, like the case of the homeward-bound porcelain dolls—a raven even figured out more than three thousand seven hundred ways to create a magic puppet that functions identically, and many of these methods are so simple that even ordinary people could master them, obscuring the real cause.