Critical Strike
Knights of the Old Republic, page 32.
At the cost of speed, you can make a devastating attack.
This feat is a bonus feat for the Jedi and Soldier classes.
Prerequisites: Base attack bonus +9, proficient with melee weapon used, Weapon Focus for the melee weapon used.
Benefit: You can take two consecutive swift actions in the same round to increase the critical range of your next melee attack by 1. Thus, if a weapon scores a critical hit on a natural 20, it can score a critical hit on a natural roll of 19 or 20 instead. However, any roll other than a natural 20 is not considered an automatic hit; if you roll a natural 19 and miss the target, you do not score a critical hit. You lose the benefits of Critical Strike if you lose line of sight to your target or if you take any other action before making your attack.