Path of The Endless Stomach

Where the rage of some barbarians comes from anger or hatred, that of a few barbarians comes from a ever more primal force: raw, primal hunger. Barbarians of the path of the endless stomach channel their great hunger into a raw force of digestion and survival.

Chewing Fury

When you choose this archetype at 3rd level, your hunger crushes prey before it reaches your gullet. While raging you deal bludgeoning damage equal to your Strength modifier + your Bonus Rage Damage when you successfully start a grapple. Also, each creature you are grappling at the start of your turn takes 1d6 acid damage, as your hunger gnaws even outside your body.

Devouring Hold

By 6th level, your hunger turns your mouth into a powerful weapon. You can grapple and make unarmed strikes with your mouth. When you use your mouth to make an unarmed strike, it deals damage equal to 1d6 + your Strength modifier.

Your jaw becomes more powerful as you gain levels in this class. At 10th level, your jaw's damage die increases to a d8. At 14th level, it becomes a d10.

Speedy Grip

Starting at 6th level, you can halt creatures that try to flee in their tracks, the better to demand food or catch it yourself. When you make an opportunity attack against a creature, you can make a grapple attempt against the creature instead of a weapon attack.

Trick Maw

By 10th level, you can devour anything to stave off your hunger. You can eat up to 1 pound of metal, wood, stone, or other typically inedible material over the course of 1 minute. Each day you can devour an amount of material with a weight equal to your Constitution score. You do not gain sustenance from eating such material if you would not normally, but it is chewed beyond use as soon as you eat it.

A few rare and particular materials are beyond even your ability to digest, including adamantine and diamonds. You also cannot devour or destroy magic items using this feature.

Swallowing Jaw

By 14th level, you your bite can break down the flesh with more than your teeth. Once per turn, when you hit with your jaw you deal an additional 3d6 acid damage, tearing off part of their body to swallow.