Sanctify Weapon

 
Prerequisite(s): Ability to cast Align Weapon
 
Benefit: When you cast align weapon, the weapon becomes sanctified, it deals one extra point of damage to evil creatures and 1d4 damage to evil outsiders and evil undead. In addition, creatures with the corrupted template cannot heal sanctified damge through normal means or even fast healing.
 
Source: Book of Exalted Deeds