You have Resistance to Necrotic damage and Radiant damage.

You have Darkvision with a range of 60 feet.

As a Magic action, you touch a creature and roll a number of d4s equal to your Proficiency Bonus. The creature regains a number of Hit Points equal to the total rolled. A hostile creature within 10ft takes necrotic damage equal to half the healed amount. Once you use this trait, you can’t use it again until you finish a Long Rest.

Lingering Radiance: You shed dim, shadow-tinted starlight in a 5-ft radius when you are:

• Bloodied
• Casting necrotic spells.
• Using Racial Abilities.
• Emotionally overwhelmed.

This dim light overwhelms all sources of light and darkness, both mundane and magical. 

When you reach character level 3, you can transform as a Bonus Action. You regain all uses when you finish a Long Rest. you have a number of uses equal to you proficiency bonus.

The transformation lasts for 1 minute or until you end it (no action required). Each transformation has a usage cost.

 Here are the transformation options:

• Ashen Wings.  (One Use) Spectral Wings.
• Dawn's Veil. (One Use) Aura of Dawn.
• Necrotic Shroud. (One Use) Aura of Dusk. 
• Ashen Dawn. (Two Uses) Spectral Wings & Aura of Dawn.
• Broken Halo. (Two Uses) Spectral Wings & Aura of Dusk. 
• Fallen Angel. (Two Uses) Aura of Dawn & Dusk.
• Dawn's Last Light (Three Uses) Full Celestial Revelation.

The Cost. When the transformation ends:

• One Use. You gain one level of exhaustion unless you dealt necrotic damage during the transformation.
• Two Uses. Your Lingering Radiance activates for an hour.
• Three Uses: You are at disadvantage to wisdom (insight) checks and charisma (persuasion) checks as you are emotionally numb for an hour.