Needs review
Source: Secrets of the Dragon

Description: You can work yourself into a righteous frenzy against an opponent who fails to fall before you

Prerequisites: STR 13, Base Attack Bonus +1

Each time you strike an opponent in combat, you gain a +1 damage bonus on further melee attacks against them. This bonus stacks each time you strike them, but you immediately lose all bonuses accumulated from the use of this feat should that opponent ever be more than five feet away from you. This added bonus may never be higher than your level. It you do not strike your opponent for one round; the bonus decreases by one.