Needs review
Source: Book of Exalted Deeds

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

Prerequisites: Weapon Focus, CHA 15

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.