Acid Blade

You imbue the weapon used as a component for this spell with corrosive magic and make an attack with it, if the attack hits at the start of each of its turns the target takes 1d4 acid damage for 1 minute or until it regains health

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 acid damage to the second creature increases to 1d4 + your spellcasting ability modifier. Both damage rolls increase by 1d4 at 11th level (2d4 and 2d4) and 17th level (3d4 and 3d4).