As a bonus action, you can call upon the power within you to surge skyward. You move up to half your current speed directly upwards. This does not use any of your movement, nor does the movement provoke attacks of opportunity. 

Having the height advantage on enemies does not grant you advantage on attacks against them, but may negate any cover they may have.

You can use this feature a number of times equal to your proficiency bonus. You regain all expended uses after you finish a long rest.

Your draconic heritage grants you physical hardiness in the form of shimmering protective scales. Your unarmored AC is equal to 13 + your Dexterity modifier.

Blessed by the impressive tact, leadership capacity, and tenacity of your parents, you are deft and hardy. Your Charisma score increases by 2, and your Constitution score increases by 1.

Your celestial heritage manifests itself in various ways. Your gently glowing eyes cut through nonmagical darkness with ease, granting you Darkvision up to 60 feet.

Additionally, you have a pair of wings (either celestial, draconic, or a mixture of both in appearance) that sprout from your back, granting you a flying speed equal to your current speed. 

The potent mixture of blood running through your veins grants you resistance to Radiant and Necrotic damage.

Young celestial dragonborn grow at a rate roughly half that of a human. They reach adulthood at age 30-40, and seemingly do not age further than that, remaining at the peak of their physical abilities for as long as they live. 

Celestial Dragonborn tend to follow in the steps of their parents, becoming powerful forces for good. Their methods may vary, but most are Lawful or Neutral Good.

Celestial 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. Your wings grant you a flying speed equal to your walking speed. 

You can speak, read, and write Common, Celestial, 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.