Armour of Rusting

This dark red armour leaves behind it a cloud of rust flakes. Every movement of its wearer produces a grinding noise from the joints.

Any nonmagical weapon made of metal that hits the wearer of this armour corrodes. After dealing damage, the weapon takes a permanent and cumulative −1 penalty to damage rolls. If its penalty drops to −5, the weapon is destroyed. Nonmagical ammunition made of metal that hits the rust monster is destroyed after dealing damage.

This armor consists of a fitted metal chest piece worn with supple leather. Although it leaves the legs and arms relatively unprotected, this armor provides good protection for the wearer's vital organs while leaving the wearer relatively unencumbered.

Notes: creature proficient with heavy armour