Reaper

As a reaper you use your new weapon type  scythe what else to reap the souls of living creatures and then using these souls to reap even more creatures.

Gain resistances and other unique buffs and even more if in darkness.

Eventually you might be able to turn into death itself became an avatar of death and let your god complex take over.

Scythe mastery

Beginning when you choose this archetype at 3rd level, you gain profecency with scythes and deal 1d4 extra necrotic damage when using scythes as weapons

Soul Harvest

Starting at 7th level, you gain soul points after killing an creature based on the max hp the creature had, you then can use these without needing an action for the following abilities:

5 Soul points - heal by one hp.

10 Soul points - gain 5 max movement speed this turn (stackable)

20 Soul points - when attacking, attack + 1 damage (not stackable).

30 Soul points - when getting attackt, attack + 1 to your AC (not stackable).

40 Soul points -reroll an attack dice to hit a creature.

50 Soul points - this round you can use your bonus action also like an normal action.

75 Soul points - Action surge.

80 Soul points - gain advantage on your saving throw.

100 Soul points - When getting attackt gain resistance for that damage type before the damage is dealt to you until the end of your next turn

Resistances

At 10th level, you gain resistance from necrotic damage and can choose a second resistance from one of these:

-Piercing

-Poison

-Fire

-Acid

-Cold

-Lightning

-Slashing

-Bludgeoning

One with the shadow

Starting at 15th level, you will recieve buffs when being in places that are lit at most dim light, which are:

-20 foot more max movement speed in the dark

-1d4 bonus necrotic damage in the dark

-having true sight in the dark

-no longer resistant to necrotic but immune to necrotic damage in the dark

Avatar Of Death

At 18th level, you become the pinnacle of death a being which is a conduit for death to send souls to the afterlife. as a free action you can once per short/long rest enter your Avatar Of Death state, which provides the follwing effects:

-gives you resistance to slashing, bludgeoning and piercing damage for 1 minute. 

-  +1d8 necrotic damage for 1 minute. 

- one more action, bonus action and reaction are available for 1 minute. 

-30 foot more max movement for 1 minute. 

-An black inky appearence just slightly resembeling a humanoid for 1 minute. 

-a sheer unlimited number of tentacles on the back that can be used as hands for 1 minute. 

- magical darkness is cast around the reaper with only him being able to look through for 1 minute. 

-The wielder is allowed to use Incorporeal Movement which allows them to move through creatures and objects as if they are difficult terrain but they take 1d10 force if they end a turn inside of an object for 1 minute. 

-when killing an enemy in this form gain one use of action surge for 1 minute. 

-lastly when attacking one creature but multiple creatures are in your attack range you get to attack all of them at once even if they are allies for 1 minute.