Your Dexterity score increases by 2, and your wisdom score increases by 1.  

Eastern Dragonborn mature at a similar rate as humans. However Eastern Dragonborn, live considerably longer and can live to be over 1000 years old. Some Eastern Dragonborn, that live to an exceptionally old age have become full dragons leaving any mortality they had behind. 

Eastern Dragonborn tend to be a good alignment. Much like their draconic ancestors  Eastern Dragonborn, are known for their kindness and nobility. 

Eastern Dragonborn are taller and heavier than humans, standing 6 to 7 feet tall and weighing upwards of 300 pounds. Your size is medium.  

Your base walking speed is 30 feet, and you have a swimming speed of 30 feet.

You have a tough, scaly hide. When you aren't wearing armor, your AC is 13 + your 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.

Your claws are a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d6 + your Dexterity  modifier, instead of the bludgeoning damage normal for an unarmed strike. Because of the Eastern Dragonborn's natural fighting abilities your claws count as a Monk weapon.

You can breathe air and water.

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 can’t discern color in darkness, only shades of gray.

Eastern Dragonborn are either Frost, Fire, or Lightning dragons depending on their ancestry. Your breath weapon and damage resistance are determined by the dragon type, of Frost, Fire, or Lightning. 

You have resistance to the damage type associated with your draconic ancestry.

You can use your Bonus action to exhale destructive energy. Your draconic ancestry determines the damage type of the exhalation. When you use your breath weapon, each creature in a 5 by 30 ft line, 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(Or your spell Save DC if higher). A creature takes 2d6 damage on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. After you use your breath weapon, you can’t use it again until you complete a short or long rest.

You can speak, read, and write Common and Draconic, and one extra language. 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.