Black Draconic Savagery

Your body distorts and becomes more feral in appearance.   Your spines enlarge, teeth elongate and sharpen, your fingers lengthen and your fingernails extend.  Acid begins to dribble from your mouth and gather beneath your claws.  Make a melee spell attack against one creature within 5 feet of you. On a hit, the target takes 1d10 acid damage. You return to normal after the attack.

The spell’s damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).