You can fly, defend yourself, or cause gusts of wind. You can fly up to 30ft 4th, and 60ft at 12thlvl. When not flying you may use them to defend yourself like a shield, adding a +2 to your AC, or as a bonus action you can create a gust of wind. 

At level 14 you are Immune to Fire damage

Your CON score increases by 3, and your Charisma score increases by 2.

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 10,000.

Demonic Half-Dragon are much taller and heavier than humans, standing well over 10 feet tall and averaging almost 400 pounds. Your size is Large.

Your base walking speed is 30 feet.

You can use your action to exhale destructive burning energy. When you use your breath weapon, each creature in the area of the exhalation must make a CON saving throw,. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d8 damage on a failed save, and half as much damage on a successful one. The damage increases to 3d8 at 6th level, 4d8 at 11th level, and 5d8 at 16th level. You have a number of uses equal to your Proficiency, which restore after a short or long rest.

Your scales have grown tougher and more durable. Giving you Natural Armor of 13+con. 

Your tail can be used as a weapon, slamming into people, but is dexterous enough to be used as a third arm. Your tail swing out as a bonus action using Str/Dex + proficiency,  if it hits you deal 1d8+Str. Your tail is also dexterous to be used as a third arm, allowing you to grapple an opponent after a successful hit.

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.

You are resistant to fire damage