Languages. You can speak, read, and write Common and Celestial. Part of the knowledge imparted onto a nephilim is knowledge of the Celestial language. As a language, it sounds like a heavenly choir when spoken, and is written with a grace and fluidity that no mortal language has replicated

Celestial Wings. You have a pair of ethereal wings in the likeliness of your parents. When you are falling you can glide as if under the effect of the feather fall spell the wings become physical. Any creature with truesight or that can see into the ethereal plane can see these wings

While you do not possess the ability to see the truth in all things your divinity grant you superior vision in dark and dim conditions. 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 grey

 As an action, you can grant up to three creatures within 10 feet of you temporary hitpoints equal to your level. You may do this once, and regain the use after finishing a long rest.

Ichor. The blood that runs through your veins is a golden ichor. You are resistant to radiant and necrotic damage

Increase charisma by 2 and two other abilities by 1

Once a week you can call upon one of your parents to aid you it is up to dm how they help

Celestial. Your creature type is both humanoid and celestial. You have advantage on saving throws against effects affect creatures with the celestial creature type but not the humanoid creature type