Undead

Undead are creatures that don't live anymore, but instead are driven by Negative Energy. Since they don't depend on the functioning of organs, they are immune to Sneak Attacks, critical hits and usually poison and diseases. Negative Energy usually heals them, Positive Energy injures them. A lot of Undead are vulnerable to fire.

Known types of Undead:
 * Vampires
 * Ghosts
 * Skeletons
 * Mummies
 * Liches
 * Shadows