Ability Score Increase. Increase one score by 2 and increase a different score by 1, or increase three different scores by 1.
Size. The average Dragonborn height is 6 feet tall. If you are under 4 feet tall, your size is Small size. If you are over 4 feet, you are Medium size.
Speed. Your walking speed is 30 feet.
Lifespan. On average, Dragonborn live to be around 80 years old.
Creature Type. You are a Humanoid.
Language. You can speak, read, and write Common and one other language that you and your DM agree is appropriate for your character.
Draconic Ancestry. Your lineage stems from a dragon progenitor. Choose the type of dragon from the Draconic Ancestor table. Your choice affects your Breath Weapon and Damage Resistance traits. The chosen dragon also affects your appearance, with you displaying coloration and other features reminiscent of that dragon.
Draconic Ancestor table
Dragon - Damage Type
Amethyst - Force
Black - Acid
Blue - Lightning
Brass - Fire
Bronze - Lighting
Copper - Acid
Crystal - Radiant
Emerald - Psychic
Gold - Fire
Green - Poison
Sapphire - Thunder
Topaz - Necrotic
Red - Fire
Silver - Cold
White - Cold
Breath Weapon. As an Action, you exhale destructive energy in a 15-foot cone. Each creature in that area must make a Dexterity saving throw against a DC equal to 8 + your Constitution modifier + your Proficiency Bonus. On a failed save, a creature takes 1d10 + your character level in damage of the type determined by your Draconic Ancestry trait. On a successful save, a creature takes half as much damage. You can use this 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 determined by your Draconic Ancestry trait.
Darkvision. You can see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.