Watch Online Free on Watchseries. For the first time ever, an international investigation team joins forces to unravel the mysteries of the Malleus Maleficarum, or Hammer of Witches. Written in 1486, this infamous medieval manual changed the way the Western world saw evil. With detailed instructions on how to find, prosecute and punish witches, the Malleus inspired centuries of accusation and bloodshed on both sides of the Atlantic.