Reptiloid Feat

Prerequisites: 1st level only, near-human variant
You bear the abrasive skin, slitted eyes, and split tongue of a reptile--perhaps due to a dragonborn or kobold parent--whichgrant you the following racial traits:
Acid Spit. When you take the Attack action on your turn, you can replace one of your attacks with a lob of acid from your mouth. This is a special ranged attack with a range of 30 feet. YOu are proficient with it, and you add your Dexterity modifier to its attack and damage rolls. on a hit, the target takes 1d10 acid damage. This damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).
You can use your Acid Spit a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.