794 to 1185 -Japan. The Heian era, an era marked by the domination of the Fujiwara clan within the Japanese imperial court, but above all by the violent battle between humans and curses. Also known as the 'golden age of exorcism', this period was marked by the advent of powerful exorcists, one of whom forever marked the history of the occult world. : Ryomen Sukuna, the King of Plagues.