The material below is Open Game Content from a 3PP Source
Shatter Defenses (Combat)
Your skill with your chosen weapon leaves opponents unable to defend themselves if you strike them when their defenses are already compromised.
Prerequisites: Weapon Focus, Dazzling Display, base attack bonus +6, proficiency with weapon.
Benefit: Any shaken, frightened, or panicked opponent hit by you this round is flat-footed to your attacks until the end of your next turn. This includes any additional attacks you make this round.