As they have both a Tiefling’s adaptations to darkness and an Aasimar’s capability to seemingly cut through the darkness with their senses an Apkallu is able to see in dim light as if it were bright light for 60ft and in darkness as if it were dim light.

You have resistance to fire & necrotic damage.

At first level you know thaumaturgy and can use healing hands (As an action, you can touch a creature and cause it to regain a number of hit points equal to your level) once per long rest. At 6th level you can cast the Levitate spell once per long rest. 

Starting at 3rd level you can use your action to call forth the full force of your infernal and celestial heritage surrounding yourself in a pitch-black aura with a searing white light emitting from every edge of the aura and from your own body, emulating the appearance of the accretion disks around black holes.  Your eyes glow with a color of your choice and your skin becomes ash gray.  

Your transformation lasts 1 minute or until you end it as a bonus action and can only be used once per long rest.  While active, on each of your turns you may deal extra radiant damage to one target when you damage it with an attack or spell.  This damage is equal to your level.  

When you are hit with an attack you may use your reaction to counter attack against the creature that hit you by lashing out with your aura itself with a range of 5ft.  The target must make a Dexterity saving throw (DC 8 + your proficiency bonus + you Charisma modifier.)  On a failed save the target takes 1d10 necrotic damage and half as much on a success.  

When you reach 6th level your reaction attack while transformed can be used at a range up to 120ft against a target you can see in response to damage from a ranged attack or spell. 

 When you reach 9th level you can cast the spell Scorching Ray once while using your Walking Divinity form.  

You can speak, read and write Common, infernal and Celestial.

Your Constitution score increases by 1 and your Charisma by 2