Greater Called Shot

Greater Called Shot
You can make multiple called shots where others could land but one.
Prerequsites: Intelligence 13, Improved Called Shot, Melee Defense, Base Attack Bonus +6
Benefit: Whenever you make an attack, you can choose to replace that attack with a called shot. You can make multiple called shots in a single round. Each additional called shot after the first made in the same round takes a –5 penalty. In addition, a called shot that deals half the creature’s hit points of damage (minimum 40) is a debilitating blow.
Normal: You can make only one called shot in a round as a full-round action. A called shot that deals half the target’s hit points of damage (minimum 50) is a debilitating blow.
Special: