Path of the Sadist

Barbarians in this subclass often are active in demonic cults and will take prisoners after battle and torture them to gain information or sometimes for entertainment or to practice their craft. They will sometimes make gory artwork out of the victims entrails.

Expert Tormentor

Starting when you choose this path at 3rd level. When attempting to extract information from a prisoner using torture, make a Charisma (Intimidation) check, add your Dexterity(Slight of Hand) modifier to the roll. Four failures in a row means the prisoner dies of pain or blood loss. At 14th level you can also add a d4 to this roll.

Demonic Tastes

Beginning at 6th level, after a battle you can scour the war zone for blood assuming the skirmish took place on solid ground (not water, marshland, or sand dunes). You can drink the blood to regain hit points depending on each dead creatures size. If a creature's type is celestial or fey you gain 10 temporary hit points.

Medium = 2   Large = 1d10   Huge = 2d12   Gargantuan = 4d20

Fearless Executioner

Beginning at 10th level, you cannot be frightened and when a foe attempts to scare you, this encourages you as you think about all the blood-curdling things you have experienced and you have advantage on all d20 rolls for the rest of the battle.

Excruciating Strikes

Starting at 14th level, your practice torturing enemies has been etched in you mind and you know where to attack foes to exert the most pain. You can add your attack(STR or DEX depending on weapon) modifier twice in all damage rolls when raging.