Path of the Foul Soul

The rageful soul of a Foul Soul barbarian exceeds mortal limits, consuming not only their minds but also body. Their soul never gain mercy with a moment of eternal peace, as their rage only builds up more and more. It's not the matter of what their emotions are which they then gain strength, only how long they can keep the wrath in their soul composed.

Rage Shield

At 3rd level, your rageful soul protects your body from mortal damage, giving you resistance to necrotic damage.

Soul Dice

At 3rd level, you get a set of d8s called Soul dice, which you can expend these dice to fuel your attacks and yourself.

You gain an additional die at 6th, 10th and 14th level.

Wrathed Smite

The rage in you can take toll of your body to make your attack destructive. Starting at 3rd level, when rolling damage for a melee attack you can choose to expend any amount of Soul dice and take the rolled damage yourself, but you also get to add the dubbled result to the damage for the attack.

You gain another d8 at 6th, 10th and 14th level.

Reapered Soul

At 6th level, you learn to harness the souls of yours and others. As a bonus action, you can expend a Soul dice to regain hp, or take Soul dices worth of damage yourself to regain previous spent Soul dice. In addiction, on a melee attack against a creature you can make them roll a constitution saving throw to regain one Soul dice. The creature takes necrotic damage equal to the Soul dice in the process. Undead and creatures with immunity to necrotic damage is immune to this effect. You can not exceed your max total number of hit dices.

Swift of The Enraged

At 10th level, when a poor soul is ceased from your rage you only become faster. When you kill a creature you gain one extra attack on your turn. You can only gain 2 extra attacks.

Wrathful Rebuke

Starting at level 14, when damage reduces you to 0 hit points, you can make a constitution saving throw (DC 5 + the damage taken). You can expend any number of Soul dice to add to your roll. On a success, you instead drop to 1 hit point.