Dragonborn

Born of dragons, as their name proclaims, the dragonborn walk proudly through a world that greets them with fearful incomprehension. Shaped by draconic gods or the dragons themselves, dragonborn originally hatched from dragon eggs as a unique race, combining the best attributes of dragons and humanoids. Some dragonborn are faithful servants to true dragons, others form the ranks of soldiers in great wars, and still others find themselves adrift, with no clear calling in life.

Proud Dragon Kin

Dragonborn look very much like dragons standing erect in humanoid form, though they lack wings. The first dragonborn had scales of vibrant hues matching the colors of their dragon kin, but generations of interbreeding have created a more uniform appearance. Their small, fine scales are usually brass or bronze in color, sometimes ranging to scarlet, rust, gold, or copper-green. They are tall and strongly built, often standing close to 6½ feet tall and weighing 300 pounds or more. Their hands and feet are smiting, talonlike claws with three fingers and a thumb on each hand.
The blood of a particular type of dragon runs very strong through some dragonborn clans. These dragonborn often boast scales that more closely match those of their dragon ancestor-bright red, green, blue, or white, lustrous black, or gleaming metallic like gold, silver, brass, copper, or bronze.

Self-Sufficient Clans

To any dragonborn, the clan is more important than life itself. Dragonborn owe their devotion and respect to their clan above all else, even the gods. Each dragonborn's conduct reflects on the honor of his or her clan, and bringing dishonor to the clan can result in expulsion and exile. Each dragonborn knows his or her station and duties within the clan, and honor demands maintaining the bounds of that position.
A continual drive for self-improvement reflects the self-sufficiency, of the race as a whole. Dragonborn value skill and excellence in all endeavors. They hate to fail, and they push themselves to extreme efforts before they give up on something. A dragonborn holds mastery of that particular skill as a lifetime goal. Members of other races who share the same commitment find it easy to earn the respect of a dragonborn.
Though all dragonborn strive to be self-sufficient, they recognize that help is sometimes needed in difficult situations. But the best source for such help is the clan, and when a client needs help, it turns to another dragonborn clan before seeking aid from other races or even from the gods.

Traits

Draconic Ancestry. You have draconic ancestry. Choose one type of dragon from the Draconic Ancestry table. Your breath weapon and damage resistance are determined by the dragon type, as shown in the table.
Breath Weapon. When you take the Attack action on your turn, you can replace one of your attacks with an exhalation of destructive energy. Your draconic ancestry determines the size, shape, and damage type of the exhalation.

When you use your breath weapon, each creature in the area of the exhalation must make a saving throw, the type of which is determined by your draconic ancestry. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. On a failed save, the creature takes 1d10 damage of the type associated with your Draconic 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.

Damage Resistance. You have resistance to the damage type associated with your draconic ancestry.
Languages. 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.
Depending on your draconic ancestry your get:
Chromatic Warding. Starting at 5th level, as an action, you can channel your draconic energy to protect yourself. For 1 minute, you become immune to the damage type associated with your Chromatic Ancestry. Once you use this trait, you can't do so again until you finish a long rest.
or

Metallic Breath Weapon. At 5th level, you gain a second breath weapon. When you take the Attack action on your turn, you can replace one of your attacks with an exhalation in a 15-foot cone. The save DC for this breath is 8 + your Constitution modifier + your proficiency bonus. Whenever you use this trait, choose one:

Enervating Breath. Each creature in the cone must succeed on a Constitution saving throw or become incapacitated until the start of your next turn.

Repulsion Breath. Each creature in the cone must succeed on a Strength saving throw or be pushed 20 feet away from you and be knocked prone.

Once you use your Metallic Breath Weapon, you can't do so again until you finish a long rest.

Chromatic or Metallic

Dragonborn with chromatic ancestry claim the raw elemental power of chromatic dragons. The vibrant colors of black, blue, green, red, and white dragons gleam in those dragonborn's scaled skin and in the deadly energy of their breath weapons. Theirs is the raw elemental fury of the volcano, of biting arctic winds, and of raging lightning storms, as well as the subtle whisper of swamp and forest, toxic and corrosive.
Dragonborn with metallic ancestry lay claim to the tenacity of metallic dragons—brass, bronze, copper, gold, and silver—whose hues glint in their scales. Theirs is the fire of hearth and forge, the cold of high mountain air, the spark of inspiration, and the scouring touch of acid that purifies.