Magic Weapon Abilities - Rusting
A rusting weapon is never constructed of any iron parts, but must be built of wood, bone, stone, or other nonferrous materials. When it is employed, it can cause metal objects with which it comes into contact to quickly rust. A wearer of a ferrous armor or shield that is struck by a rusting weapon must make a DC 16 Fortitude saving throw or the item loses 1 point of armor bonus - shields are struck first. Once an item loses its entire armor bonus, it falls to pieces, ruined. Bows, crossbows, and slings so crafted confer the rusting ability upon their ammunition.
Aura: Moderate transmutation
Caster Level: 7th
Requirements: Craft Magic Arms and Armor, rusting grasp
Price: +1 bonus