Mage's Rust (UnseenMage)
On the clashing cubes of Acheron war rules. Machines of battle rise and fall across it. Weapons only dreamed of can be found in the rusting heaps of its third layer. Is it any surprise then that it is on Acheron that a disease which infects not the living but the machine first developed? Mage's Rust is a disease which affects constructs, both metallic and not. It is so called because the first visible symptom is a red ooze which leaks from their body along rust-colored discolorations. An airborne virus spread by the time Mage's Rust's symptoms are shown it is already usually too late. Mage's Rust cannot be cured by Remove Disease although a Break Enchantment spell eradicates the disease in the target.
Mage's Rust ignores any immunity to disease or physical ability score damage a construct might possess due to its race, type, or subtype. It also ignores any immunity to disease or Fort save based effects due to having no Constitution score.
Disease DC: 14.
Disease Damage: Mage's Rust inflict 1 Str and Dex damage daily on a failed save as well as inflicting 2 negative levels on the subject each failed save.
Incubation Period: 1d4+1 days. Oozing rust does not appear for another 4 days.
Unseenmage's Rusting Contagion
Level: Sor/Wiz 4
Components: V, S
Casting Time: 1 standard action
Target: Construct touched
Saving Throw: Will negates
Spell Resistance: Yes
The subject contracts Mage's Rust, which strikes immediately (no incubation period). Use Mage's Rust's normal DC for subsequent saves, but the spell's for the initial save.