Valda's Spire of Secrets Spells: Rusting Grasp
Rusting Grasp is a Level 3 Transmutation spell for Druid, Necromancer, Witch, and Wizard. Casting Time is 1 action. Range is Touch. Requires a Verbal and Somatic Component. Duration is Instantaneous.
You conjure a potent acid at your fingertips, which can corrode metal and burn flesh. Make a melee spell attack against a creature or object within your reach. On a hit, a creature takes 6d4 Acid damage and it has a -3 penalty to its AC, to a minimum of 10, for 1 hour.
If you target a nonmagical metal object with this spell that isn't being worn or carried, you corrode and destroy parts of the object you choose that can fit within a 1-foot Cube.
Using a Higher-Level Spell Slot: The damage increases by 2d4 for each spell slot level above 3. If you target a nonmagical object, you can destroy an additional cubic foot for each slot level above 3.