Divine Executioner V3

Aasimars are carry the blood of the celestials, radiant beings that grace the heavens. Most are servants of the divine and walk a path of lawfulness and good. You are the same, but you have a different purpose than your brethren. The duty you have been given is "Divine Executioner." Many scum walk the realms and some may even rise to end them. It is your duty to ensure that never comes to pass. 

A Divine Executioner fights with brutal grace. Your entire body is a weapon. You are both warrior and assassin. Protector and executor. Never forget the duty you have chosen or been bestowed. The sake of the realm lies in your hands. 

Divine Punishment

Starting at 3rd level, your sneak attack damage can deal radiant damage.

Angelic Anatomy

Starting at 3rd level, you have inherited the power and physicality of the celestials. You are a weapon. Your wings are no longer a temporary blessing and have hardened to become deadly weapons and a shield in your time of need. 

Feather Blades Your feathers are reinforced with your divine energy and can be used as weapons. Your feather blades are considered magical and count as a simple melee weapon with the finesse and thrown (range 30/120) properties. At 3rd level, your feather blades deal 1d6+ DEX piercing damage. Using an attack action you can target an enemy and fling a number of feather blades equal to half your proficiency bonus (minimum of 1, round up).

The damage increases at 9th level to 1d8, 13th level to 1d10, and 17th level to 1d12.

Wings of Shielding As a reaction, your wings furl around you to protect you from damage. The effect is the same as the Shield spell. Until the start of your next turn, you have a +5 bonus to AC, including against the triggering attack, and you take no damage from magic missile.

You can use Wings of Shielding an equal number of times up to half your proficiency bonus (minimum of 1, round up). All uses return after a short or long rest. 

Executor's Blade

Starting at 9th level, you are most lethal when you get the drop on your enemies. You have advantage on attack rolls against any creature that hasn’t taken a turn in the combat yet. In addition, any hit you score against a creature that is surprised is a critical hit and deals radiant damage. Damage dealt with this feature can't be regenerated. 

(This is a variant of the assassinate feature for the assassin rogue archetype)

Celestial Aerialist

At 13th level,  your flying speed increases to 60 feet and you have an advantage of Dexterity Saving Throws.

Heavenly Judgement

When you reach 17th level, you have become the epitome of justice and a defender of the realms. No one can escape your judgement. When you make a sneak attack you can have the targeted enemy and other opponents within 5 feet of them make a Constitution Saving Throw. Unless the target successfully saves, it is paralyzed from witnessing the wrath of the heavens until the end of your next turn. Enemies within 5ft take 1d12 radiant damage and unless they successfully save, they are blinded till the end of your next turn.

You can use this feature a number of times equal to half your proficiency bonus (minimum of 1, round up). You regain all uses of this feature after a long rest.