The Silver Left
+1 Silversheen Short Sword
A complex process involving metallurgy and alchemy can bond silver to a weapon made of steel so that it bypasses the damage reduction of creatures such as lycanthropes. Additionally blades made of this special metal are immune to rust, including that of rust monsters, the rusting grasp spell, and so on.
On a successful attack with this weapon, the wielder takes a –1 penalty on the damage roll (with a minimum of 1 point of damage).