Brothers of Shadow

The Brothers of Shadow were monks corrupted by the Shadow Dragon when the creature took control of their monastery in the plateau between the serpent's Fangs. They have been originally a sepataratist sect of the Brotherhood of Shinsei. They were kept as a hidden resource by the Shadow Dragon, which sent as an abbot a Shio no Oni. Inside the monastery was located the Book of Shadows, the alleguedly lost Seventh Book of Enlightenment.