Acid Bolt

You hurl a ball of acrid sludge at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 acid damage. A corrodible object hit by this spell slowly beings to melt if it isn't being worn or carried.

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).

(this spell should be the subject of heavy contemplation before being allowed by a dm as while it does allow an extra level of flavor to your world for those players wishing to play a specific type of mage it does allow for the bypassing of resistances that would typically add a level of difficulty to most pre-written modules or campaigns)