Path of the Insatiable Hunger

Barbarians who follow the path of Insatiable Hunger are ruled by it. Nothing fills them but they've learned to take the constant pain in their bellies and use it to send themselves into terrifying rages. Foes who come across one of these barbarians rarely get away unscathed, if they do it is usually with a chunk or two missing. The hunger is there and it just won't go away, but there is power in hunger.

Rip & Tear

When you follow this path at the 3rd level your teeth begin to sharpen harden, and grow into fangs becoming menacing weapons to sate your intensifying hunger.

You gain a bite attack that you may use as a bonus action, that you are proficient in, against an enemy within 5ft of you. This bite deals 1d4 damage plus your Strength modifier. When you reach certain levels, the size of the dice increases: at 6th level (d6), 10th level (d8), 14th level (d10), and 18th level (d12).

While raging when the attack hits you may take a piece of flesh with you when you make your bite and consume it. Consuming it grants you temporary hit points equal to the damage dealt. You may use your consuming feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest. This ability does not work on Constructs.

Iron Gullet

Also at 3rd level as the hunger consumes you it strengthens your stomach. You are now resistant to poison damage and immune to disease.

Taste The Rainbow

At 6th level when you use your Rip & Tear bonus action and consume an enemy's flesh you are empowered by them. You gain all of the natural resistances the target has as a piece of them is now a part of you. The resistances last until you consume another piece of flesh or 1 hour has passed, whichever comes first. This ability does not work on Constructs.

Really Sharp Fangs

Starting at 6th level, your fangs count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage when you use Rip & Tear.

Dripping Maw

When you reach 10th level, when you take a bite out of an adversary with your Rip and Tear feature you may choose up to 10 creatures within 30 feet of you that can see you. The chosen creatures must succeed on a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Strength modifier) or be frightened of you for 1 minute. This effect ends if the creature ends its turn more than 60 feet away from you.

Creatures that succeed on their saving throw, cannot be frightened by you for 24 hours.

You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Subverting Appetite

At 14th level, The hunger you constantly endure emanates from you affecting those in your vicinity. When you enter your rage a 10ft aura extends from you in every direction, but not through total cover. Those caught in your aura must make a Wisdom saving throw (DC equal to 8 + your Strength modifier + your proficiency bonus) or succumb to a maddening hunger, dropping whatever they hold in their hands and attacking the closest being to them with whatever natural weapons they possess, in an attempt to sate themselves. This effect lasts for 1 minute. Each affected creature repeats the saving throw at the end of its turn, ending the effect on itself with a success. This ability does not affect constructs.