Type: General
Source: Player's Handbook II
When you strike an opponent with a piercing weapon, the brutal impact of your strike sends him sprawling.
Prerequisite: Proficiency with selected piercing weapon, Weapon Focus with selected piercing weapon, Weapon Mastery (piercing), Weapon Specialization with selected piercing weapon, base attack bonus +14.
Benefit: If you use a full-round action to make a single melee attack with any piercing weapon and succeed in hitting, you can initiate a special bull rush attempt against the target. This bull rush uses your total bonus on damage rolls in place of your Strength modifier. You do not provoke an attack of opportunity with this bull rush, and you cannot move forward with your opponent.
If you succeed in pushing an opponent back 10 feet or more, you can reduce the distance you push him by 10 feet. In return, your foe falls prone in the square where he ends his movement. Note that by reducing the distance you push your opponent, you can have him fall prone in his current space.