Due to your power over shadows you can blend into the shadows, you gain proficiency in the Stealth skill, and you have advantage on any Stealth checks made in dim light or darkness. This also gives you advantage with attack rolls from the shadows.

You have advantage on any Perception checks made to see hidden creatures in dim light or darkness.  In addition, at 10th level, you can't be surprised while in dim light or darkness.

The power of the shadows lets you cast Darkness and Misty Step and at level 10 you can cast Pass without a trace, and invisibility once per long rest.These spells don't count against your spells known.

When you go down to 0 hit points your hair becomes jet black and your eyes are inky black and seem to be leaking darkness.The shadows around you cluster around your body and covers you then burst out casting the Darkness spell bring you back to 1 hit point. You can only use this once per long rest.

Your Speed depends on your what your subrace has +5

Shadowborns age depends on your subrace

Your Wisdom score increases by 2, and your Dexterity or Strength by 1

Because of your Shadowborn nature they tend be in the Chaotic Alignment

You can speak and read Common, Celestial,and Infernal

Your size depends on your subrace that you have chosen. 

Due to your shadowy affinity, you can see in dim light within 120 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.  In addition, magical darkness doesn't impede your vision.

Because of your affinity with the shadows you can travel through shadows up to 60 ft for 30 minutes  as long as you can fit in the shadow. You can take one extra creature with you and travel up to 30 ft for 15 minutes as long as you can fit in the shadow. This power is taxing on your body if you are by yourself after the time is up you can do any action other then move and are have your speed for 15 minute. When you have an extra creature with you its the same as if it was just you but its 30 minutes. This is a risky power so its best not to use it unless its appositely necessary. Creatures don't get a attack of opportunity on you. You can only use this ability once per long rest.