Form V

Form IX: Shien was a form of lightsaber combat.

Shien uniquely involves a Jedi holding the lightsaber horizontally. The Jedi pointed the end of the blade at the opponent; it was swung in a fast arc while the Jedi punched his or her saber-hand at his or her opposing combatant, in a stabbing motion.

Behind the scenes
In the game Star Wars: Knights of the Old Republic II: The Sith Lords, Master Zez-Kai Ell or Vrook Lamar (depending on the order in which you visit planets) teaches the Exile this form if the Exile is either a Jedi Guardian or a Jedi Sentinel. (This is not to be confused with Form V: Shien / Djem So.)