Path of the Glutton

Some barbarians have a thing for food. The Path of the Glutton is a path for extreme eaters, you would do anything for food, even eating your opponents! Barbarians who choose this path become practically starved and can eat almost anything.

Immense Hunger

Starting when you choose this path at 3rd level, you can eat your opponents, if you aren't the same race, when you enter a rage. You can take a bite out of the enemy as a bonus action twice. If you do so, you damage your opponent and heal yourself, but if they're the same race as you, you take poison damage and become poisoned.

Extreme Gluttony

Beginning at 6th level, you eat a lot more and get reasonably bigger, you Unarmored Defense gets a buff and so does the Bite Attack, however, your weight and size increase and your speed reduces.

Stronger Stomach

Beginning at 10th level, you've become accustomed to eating strange things, Bite deals less poison damage if you're the same race.

Cannibalism

Starting at 14th level, Bite does and heals a lot more and you can be a cannibal without consequence. Your unarmored defense gets a bonus, too.