Acid Spit

You release a spray of acid from your mouth in a line 15 feet long and 5 feet wide in a direction you choose. Each creature within this attack range must succeed on a Dexterity saving throw or be covered in acid for the spell's duration. Until the creature uses its action to wipe away the acid, it continuously suffers its effects. 

The initial attack deals 1d6 damage.

A covered in the acid takes 2d4 acid damage at the start of each of its turns.