Rust metal: Each time a metallic object is said to become *rusted*, make an unmodified d20 roll DC 0 +4 per each point of rust the object already has (each metal object has 0 points of rust by default). On success, the object gains another point of rust. On failure, the object is corroded into a pile of useless rusted metal flakes and is gone forever. At the end of a fight in which at least one point of rust has been inflicted, all rusting objects make the check with same modifiers. On success, rusting is superficial and can be cleaned up during a short break. On failure, the object disinte…