Random Magic Weapons (any level)

A chaotic weapon is chaotically aligned and infused with the power of chaos. It deals +2d6 points of bonus chaotic damage against all of lawful alignment. It bestows one negative level on any lawful 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 chaotic power upon their ammunition.
Aura: Moderate evocation (chaotic)
Caster Level: 7th
Requirements: Craft Magic Arms and Armor, chaos hammer, creator must be chaotic
Price: +2 bonus
Source: Dungeon Master's Guide v.3.5