Acid Hand

You uppercut your target with a fist dripping with highly corrosive elemental acid. Make a melee spell attack against a creature within reach. On a hit, the target takes 6d8 acid damage.

The acid is designed to eat through protections. If the target is wearing non-magical armor, the armor's AC bonus is reduced by 2 (to a minimum of +0) until the armor is repaired by a smith. The target also takes 2d8 acid damage at the start of its next turn as the acid continues to burn.