Base Class: Rogue
There are many who would take up the paladin's vow in order to smite evil. But as they march off to war clad in holy plate armor, there are those with same goal in mind that stalk in the shadows around them. Armed With Stealth and all the radiant power given to their armor compatriots, they act as holy assassins, shining blades that strike quickly and leave behind only smoldering pile of smitten undead and demons. The Style of the raven's shadows was developed after one legendary rouge killed an ascendant god as part of a deal to his patron; the raven queen. His sacrifice inspired so many to walk in his shoes and those once unworthy of oaths, and sacraments where given a chance to partake in the war against the war against evil that threatens all of mortality.
Eyes in the darks
Starting at 3rd level, when you choose this archetype, the darkness becomes no obstacle to you but every bit as one to your enemies. You can see normally in darkness, both magical and nonmagical, to a distance of 120 feet. Additionally, While in darkness, you are invisible to any creature that relies on dark vision to see you in that darkness.
Smiting Edge
Starting at 3rd level, when you deal sneak attack damage to a creature,
you can choose to have the damage be dealt as radiant damage. You also don't need advantage on the attack roll to use your Sneak Attack against an aberration, fiend, or undead creature. When you deal radiant damage to them this way you you roll dl O's instead pf d6's with that sneak attack.
Without Fear
Starting at 9th level, you can no longer feel any fear and as such, you can no longer be frightened.
Uneering Stalker
Starting at 13th level, you attain the gifts necessary to stalk evil into its darkest of dens. You can cast detect good and evil without expending a spell slot.
Additionally, anytime you deal radiant damage with your sneak attack, any aberration, fiend, or undead of CR 4 or less is reduced to zero hit points.
BANISHING BACKSTAB
At 17th level, when you deal sneak attack damage to a creature, you can force them to make a charisma saving throw with a DC of 8 + your Charisma modifier + your proficiency modifier.
On a failed save they are banished to small demi-plane for one minute. You must concentrate on this banishment as you would a spell and you can only have one creature banished at a time. This effect does not work on creatures with legendary actions or resistances.