Viscous Mockery

You unleash a string of insults so venomous your own saliva begins to burn and thicken like venom. As you speak your insult you hurl gobs of viscous, acidic saliva at your target.  Your target must succeed on a Dexterity saving throw or take 1d6 acid damage and have disadvantage on attack rolls against creatures other than you until the end of its next turn.

This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).