Touch of Rust

Alteration [earth]
Tier: 0
Components: Verbal, Somatic
Casting Time: 1 major action
Range: Touch
Target: Ferrous object touch
Duration: Concentration
Saving Throw: Spell negates (object)
You scrape the rust from the door, and then drag your finger across the spot again. Every day the steel is thinner.

A thin layer of rust spreads from your fingertip, covering about 4 square inches per round. This rust can jam hinges and mechanisms, but doesn’t do substantial damage to the metal itself.