From the back cover: "Mystery Codex is a supplement for the Witchcraft roleplaying game. In it, you will find: Two new Character Types, the Spirits and Undead, with accompanying character creation rules, powers, vulnerabilities and background for Ghosts, Phantasms, Vampyres and the Relentless Dead. New associations: shunned Pariahs, dedicated Iscariots, elite Storm Dragons and death-obsessed Thanatoi. New Invocations and Necromancy, the gruesome Disciplines of the Flesh, and the mystical Tao-Chi. Background on Geburah, the Sephiroth of the Dead. New Character Concepts, Qualities and Drawbacks, SKills and Rules."