Path of Rot

Born in a swamp dominated by a black dragon, this barbarian has a very close relationship with entropy. Due to this relationship you have learned to manipulate the entropic forces suffusing all living things to further spread the death you so worship. 

Entropic Fury

Starting when you choose this path at 3rd level, you can channel pure entropy into your weapon strikes. While you’re raging, the first creature you hit on each of your turns with a weapon attack takes extra damage equal to 1d6 + half your barbarian level necrotic damage. 

Necrotic

The extra damage you deal with Divine Fury is necrotic.

Embodiment of Rot

When you choose this subclass, activating your rage causes an 10 ft radius aura of rot to appear around you. While your raging any creatures who willingly move into, start their turn in, or are in your radius when you activate your aura they must make a WIS saving throw (DC=8+Prof+CON) or take 1d6 necrotic damage and be frightened until the end of their next turn. On a successful save the creature only take the 1d6 necrotic damage.

Entropic Attraction

While raging you can use a bonus action to send out a tentacle of pure entropy at a target, causing them to take 2d6 necrotic damage and be pulled to within your reach unless they make a str saving throw (DC=8+Prof+STR) or be pulled to within 5 ft of you. (Enemies entering your aura of rot in this way are affected as if they had moved in willingly. You can use this feature a number of times equal to your proficiency bonus per long rest.

Rotten Form

At 10th level, you gain resistance to necrotic damage, and are immune to poison and disease.

Entropic Embodiment

 Your aura of rot now extends to 20ft radius and any time you deal necrotic damage you can add an additional 2d6 damage.