Random Magic Weapons (any level)

A holy weapon is good aligned and blessed with holy power. It deals +2d6 points of bonus holy (good) damage against all of evil alignment. It bestows one negative level on any evil creature attempting to wield it. The negative level remains as long as the weapon is in hand and disappears when the weapon is no longer wielded. This negative level never results in actual level loss, but it cannot be overcome in any way (including restoration spells) while the weapon is wielded. Bows, crossbows, and slings so enchanted bestow the holy power upon their ammunition.
Aura: Moderate evocation (good)
Caster Level: 7th
Requirements: Craft Magic Arms and Armor, holy smite, creator must be good
Price: +2 bonus
Source: Dungeon Master's Guide v.3.5