The document outlines 7 types of villains that can be used when developing stories:
1) The Mustache Twirler is a simple, over-the-top villain without depth that creates peril for the hero. Examples include Snidely Whiplash and Auric Goldfinger.
2) The Ancient Evil is a long dormant threat, like Sauron or Cthulhu, that is beyond reasoning with and requires great heroism to defeat.
3) The Mastermind is highly intelligent and always thinking one step ahead of the clever hero, like Megamind or Professor Moriarty.