Sanctify Martial Strike

(Book of Exalted Deeds, page 46, DnD 3.5)

[Exalted]

Sacred power suffuses your attacks with a certain kind of weapon.

Prerequisite

Weapon Focus (with the specified weapon), CHA 15

Benefit

Whenever you wield a specific kind of weapon, it deals 1 extra point of damage to evil creatures, or 1d4 points to evil outsiders and evil undead. In addition, that weapon is considered good-aligned for purposes of overcoming damage reduction.

Special

You can take this feat more than once, selecting a different weapon each time.