One of your ability score increases by 2, and another of your ability scores increases by 1.

Young dragonborn grow quickly. They walk hours after hatching, attain the size and development of a 10-year-old human child by the age of 3, and reach adulthood by 15. They live to be around 80.

Dragonborn are taller and heavier than humans, standing well over 6 feet tall and averaging almost 250 pounds. Your size is Medium.

Your base walking speed is 30 feet.

You have tough, scaly skin. When you aren't wearing armor, your base AC is 13 + Dexterity modifier. You can use your natural armor to determine your AC if the armor you wear would leave you with a lower AC. A shield's benefits apply as normal while you use your natural armor.

You can use your claws to make unarmed strikes. When you hit with them, the strike deals 1d6 + your Strength modifier slashing damage, instead of the bludgeoning damage normal for an unarmed strike.

Your ancestry begins the manifest itself in a variety of ways. You select one of the follow Draconic Evolutions traits for which you meet the prerequisites. As you become stronger, your ancestry will continue to manifest itself. You may pick another trait a 5th level, and another at 11th level. 

Draconic Wings

Your ancestry gifts you a set of dragon wings. Thanks to your wings, you have a flying speed of 20 feet. You can't use this flying speed if you're wearing medium or heavy armor.

Greater Draconic Wings (Prerequisites: Draconic Wings Trait, 5th Level) 

Your dragon wings appear to have grown stronger with use. Your flying speed granted by your wings increases to 40 feet. Additionally, you can use this flying speed even if you're wearing medium armor.   

Superior Draconic Wings (Prerequisites: Greater Draconic Wings Trait, 11th Level)

Your dragon wings have become an true extension of your body. Your flying speed granted by your wings increases to 60 feet. Additionally, as an action, you may uses your draconic wings to attack. Each creature within 10 feet of you must make a Dexterity Saving Throw (DC = 8 + CON Modifier + Proficiency Bonus). On a failed saved, the creature takes 3d6 + STR mod damage and is knocked prone. On a successful save, a creature takes half damage and suffers no additional effects. 

Draconic Breath Weapon 

When you take the Attack action on your turn, you can replace one of your attacks with an exhalation of magical energy. Your draconic ancestry determines the size, shape, and damage type of the exhalation. Each creature in that area must make a Dexterity saving throw (DC = 8 + your Constitution modifier + your proficiency bonus). On a failed save, the creature takes 1d10 damage of the type associated with your Chromatic Ancestry. On a successful save, it takes half as much damage. This damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10). You can use your Breath Weapon a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Greater Breath Weapon (Prerequisite: Draconic Breath Weapon, 5th Level)

Your development of your draconic breath has allowed you to use it more often. You now regain all expended uses of your breath weapon when you finish a short rest. 

Superior Breath Weapon (Prerequisite: Greater Breath Weapon, 11th Level)

Your mastery of your draconic breath has allowed you complete control when in use. Whenever you use your draconic breath weapon, you may chose whether the shape of the breath is a 5 by 30 ft line or a 15 feet cone. 

Draconic Shapeshift 

As an action, you change your appearance and your voice. You determine the specifics of the changes, including your coloration, hair length, and sex. You can also adjust your height between Medium and Small. You can make yourself appear as a member of another race, though none of your game statistics change. You can't duplicate the appearance of an individual you've never seen, and you must adopt a form that has the same basic arrangement of limbs that you have. Your clothing and equipment aren't changed by this trait. You stay in the new form until you use an action to revert to your true form or until you die. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Greater Shapeshift (Prerequisite: Draconic Shapeshift, 5th Level)

Your shapeshifting capabilities have grown to such a degree, that you find yourself capable of producing knowledge of those who you shapeshift. When you make yourself appear as a member of another race, you also learn one language that typically would be known by that race. You gain the ability of the speak, read, and write the language as long as you maintain your new form. 

Superior Shapeshift (Prerequisite: Greater Shapeshift, 11th Level)

Your shapeshifting capabilities give you such a connection to your forms, you find yourself protected by your forms able to draw on their knowledge. While transformed, you gain temporary hit points equal to your Character Level + Your Charisma Modifier. While in your true form, you can attempt to recall on a language you knew in a past form. As an action, you can attempt a DC 13 History (INT) Check. On a success, you learn one language you knew in a past form for 1 hour. Once you use this feature, you may not use it again until you finish a long rest. 

You can speak, read, and write Common and Draconic. Draconic is thought to be one of the oldest languages and is often used in the study of magic. The language sounds harsh to most other creatures and includes numerous hard consonants and sibilants.