Vile Martial Strike
(Book of Vile Darkness, page 50, DnD 3.0)
[Vile]
The character can focus evil power into her weapon blows.
Prerequisite
CHA 15, Weapon Focus with the specified weapon
Benefit
Each time the character deals damage with a specific kind ofweapon, she deals 1 additional point of vile damage.
Special
A character may take this feat more than once, selecting a different weapon each time.