Acid Cutter

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects and then the acid coating the blade lingers on the target. The target takes 1d4 acid damage at the beginning of its next turn after which the acid disappears.  

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d4 acid damage to the target on a hit, and the damage the target takes for the lingering acid increases to 2d4. Both damage rolls increase by 1d4 at 11th level (2d4 and 3d4) and again at 17th level (3d4 and 4d4).