Curse of Rust

A thin yellow ray that strikes a creature, the target must make a DEX save or one non-magical metal object the target is wearing or holding begins to corrode, become rusted, pitted and flaking, spreading from point of impact and is effectively destroyed.

Any attacks made with a destroyed weapons breaks it and attacks go through destroyed armour.

Can be cast on static objects such as locks, door hinges or a ballista's metal parts.

Has little effect on non-reactive metals such as gold and platinum.

Cannot corrode more than 5 cubic ft of metal

Can be cast at higher levels to increase number of items corroded/targets struck