Demonic Berserker V4

This subclass focuses on enhancing your rage and making you tough to beat. Giving you extra hit points when raging, and options to keep dealing damage even when you only have your meat grabbers.

Fiendish Frenzy

Your rage transforms you into a battle crazy demon shroud of yourself you develop any combination of either cloven feet, elongated claws, or horns, giving you temporary hit points equal to 1 roll of your barbarian hit die (a d12) the number of dice rolled increases at levels 6, 10, and 14. In addition, you gain natural weapons to use for unarmed strikes, this die is a d6 and can deal slashing, piercing, or bludgeoning damage depending on the type of natural weapon you choose to manifest(ie: claws, hardened gauntlets, a hidden blade, etc.) the modifier for these unarmed strikes is Strength.

No One Gets Through

At 6th level you have become a wall of necrotic might that will let no creature get past, you gain access to the following abilities:

• Your barbarian bonus rage damage is doubled while raging
• you are unable to be moved or knocked down by any non-magical means
• When a creature within your reach makes an attack against a target other than you, you can use your reaction to make a melee weapon attack against the attacking creature

Grip of Berial

At 10th level your unarmed attacks and attacks with natural weapons are magical for the purpose of overcoming resistances and deal extra necrotic damage equal to your barbarian rage damage bonus. 

Archfiend Aura

At 14th level your very presence is enough to make anyone trip up, but get too close and it'll have a severe effect on their psyche. while raging creatures you choose within 5 feet of you take 2d6 Psychic damage at the start of your turn (yes before movement). Additionally, creatures that are up to 40 feet away have disadvantage on attack rolls against you, and as a reaction, you can focus this aura on a specific target to impose disadvantage on an attack roll that targets a creature other than yourself however you leave yourself open to attacks until your next turn. (Meaning you no longer impose disadvantage on those rolling to attack you until your next turn).