Turtle Dart( Races of Stone, p. 145)
You have mastered the style of fi ghting with a short sword while wearing extremely heavy armor and carrying a large shield.
Weapon Focus (PH) (short sword) , Exotic Armor Profi ciency (battle plate or mountain plate), Exotic Shield Profi ciency (extreme shield) or Tower Shield Profi ciency,
To gain the benefit of this feat, you must be wearing exotic heavy armor and carrying an extreme shield or tower shield. When using this style, you do not provoke attacks of opportunity for moving away from any creature that you attack with your short sword in the same round.