Vile Martial Strike (Vile)

The character can focus evil power into her weapon blows.

(Book of Vile Darkness, p. 50)
Source D&D tools

• Prerequisite Charisma 15, Weapon Focus with the specified weapon,
• Benefit Each time the character deals damage with a specific kind of weapon, she deals 1 additional point of vile damage.
• Special A character may take this feat more than once, selecting a different weapon each time.