Magic Weapon Abilities - Auran
An auran weapon is imbued with the air-dominant planar trait. This power grants the weapon the ability to overcome the damage reduction of any creature with the earth subtype (regardless of what the damage reduction normally specifies). It deals an extra 2d6 points of damage against creatures with the earth subtype. It bestows one negative level on any earth 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 crafted bestow the auran special ability upon their ammunition.
Aura: Moderate evocation
Caster Level: 7th
Requirements: Craft Magic Arms and Armor, creator must be of the air subtype
Price: +2 bonus
Planar Handbook