Arcanum



The Arcanum is an ancient book written in the 15th century by the astrologer Basileus while he was under demonic possession and it is an item featured in the 2001 supernatural horror film Thirteen Ghosts (also known as Thir13en Ghosts). It contains spells, profiles on the 13 ghosts of the Black Zodiac, and blueprints for creating a mansion-like machine with which to open and gain control over the Ocularis Infernum (in Latin: "Eye of Hell").