Choose an ability score to increase by 2 and another ability score to increase by 1

Etherealborn live indefinitely, unless destroyed.

Etherealborn are similar in size to Dragonborn, you are medium.

Your base flying speed is 30 ft. You do not have a walking speed.

When wearing medium or heavy armor, you cannot fly more than an inch off the ground, but are still floating.

You do not need to eat, drink, or breathe. You still require rest.

As an action you can move into the Ethereal Plane. While in the Ethereal Plane you can see into the Material Plane, but you cannot interact with it and it cannot interact with you. Those in the Material Plane cannot see you without Truesight or the ability to see into the Ethereal Plane. You can use this a number of times equal to your proficiency bonus, regaining all charges with a long rest.

You cannot rest while in the Ethereal Plane, however there is no limit to the time that can be spent there.

You have darkvision of 60ft.

Once a day you can use a Bonus Action to gain Truesight for 1 minute.

You have resistance to necrotic damage.

You can read and write Common and Draconic. 

The featureless form of an Etherealborn also means there is no mouth to speak from, they can only communicate through telepathic means. Those spoken to in this way can understand regardless of languages known, but none can reply back telepathically. 

You know Sign Language and can cast spells without a verbal component so long as one hand is free for signing.