Path of the Monstrous Appetite

Some barbarians are driven by their hunger past everything else. Barbarians who follow the illustrious Path of the Monstrous Appetite are skilled in many ways, in and out of the battlefield. They are able to sustain themselves and their allies, while chewing through the ranks of their enemies. They are also well known for their growth and evolution, gaining new abilities and skills on the fly, sometimes even during combat. 
So pick up a fork. Pick up a knife. Get ready to eat. It is time to evolve your stomach and make banquets of your enemies.

Banquet

Starting when you choose this path at 3rd level, you gain proficiency with cook's utensils if you don't already have it.

Additionally, you can use the remains of slain monsters to feed your allies. After combat, you can make a Dexterity (Sleight of Hand) check to harvest the edible parts of a monster whose Challenge Rating is less than or equal to your level (DC 15). During the following short rest, you can then prepare a Banquet for a number of creatures (including yourself) equal to 1 + Your Proficiency Modifier. This provides the creatures as much nourishment as 1 day of rations and they can restore an additional 1d6 hit points when using hit die to recover health.

Feast

At 3rd level, when a creature dies within 5 feet of you while you are raging, you may immediately use your reaction to Feast upon it. You take a bite out of the creature, consuming it's flesh and drawing power from it.

After you Feast a creature you are provided as much nourishment as 1 day of rations. If the creature was of size medium or larger, you also gain a slight change of appearance and a bonus effect based on the creature type eaten, until the next time that you feast on a creature. Once you use this feature, you must finish a short or long rest before you can use it again. You can only have one creature type active at a time, with the newest creature that you Feast on taking priority.

Aberration

You have Feasted on an Aberration, gaining resistance to psychic damage until the next time that you Feast on a creature. Additionally, Eyeballs protrude from the palm of your hands until the effects end.

Beast

You have Feasted on a Beast, gaining proficiency in Dexterity saving throws and adding your Proficiency Bonus to Initiative rolls until the next time that you Feast on a creature. Additionally, your canines and nails both sharpen and extend until the effects end.

Celestial

You have Feasted on a Celestial, gaining resistance to Radiant damage until the next time that you Feast on a creature. Additionally, your eyes gain a bright, golden glow until the effects end.

Construct

You have Feasted on a Construct, gaining resistance to Force and Thunder damage until the next time that you Feast on a creature. Additionally, small patches of metal peak through the skin across your body until the effects end.

Dragon

You have Feasted on a Dragon, gaining resistance to the elemental damage type of the dragon's breath weapon until the next time that you Feast on a creature. Additionally, small patches of scales grow across your body until the effects end.

To get this feature to work as intended, you must have "Optional Class Features" enabled under the Home tab of Character Edit. Then, you can go over to the Class tab, click on "Optional Feature Manager" under Barbarian, and click on the Replacement Feature called "Feast: Dragon". Then, you will be able to choose the type of dragon eaten for your bonus.

Elemental

You have Feasted on an Elemental, increasing your walking speed by 10 feet until the next time that you Feast on a creature. Additionally, your hair radiates the elemental energy of the elemental consumed until the effects end.

Fey

You have Feasted on a Fey, gaining advantage on saving throws against being charmed and immunity to magical effects to put you to sleep until the next time that you Feast on a creature. Additionally, your ears become pointed or pointed even longer than before until the effects end.

Fiend

You have Feasted on a Fiend, gaining resistance to Fire damage until the next time that you Feast on a creature. Additionally, small, fiendish horns sprout from your head until the effects end.

Giant

You have Feasted on a Giant, gaining resistance to Cold damage until the next time that you Feast on a creature. Additionally, you grow 1d6 inches until the effects end.

Humanoid

You have Feasted on a Humanoid, gaining maximum hit points equal to your Constitution Modifier and immunity to effects that would reduce your hit point maximum until the next time that you Feast on a creature. Additionally, you take on a small appearance change of the humanoid consumed, such as blonde hair or darker skin, until the effects end.

Monstrosity

You have Feasted on a Monstrosity, gaining resistance to Poison damage until the next time that you Feast on a creature. Additionally, a feature of your body that you are self conscious about becomes exaggerated, such as a large nose, small hips, or big ears, until the effects end.

None

You have yet to Feast on a medium or larger creature.

Ooze

You have Feasted on an Ooze, gaining resistance to Acid damage until the next time that you Feast on a creature. Additionally, you secrete a light green goo from your hands until the effects end.

Plant

You have Feasted on a Plant, doubling your carrying capacity (including maximum load and maximum lift) and allowing you to ignore difficult terrain while grounded until the next time that you Feast on a creature. Additionally, Your legs become stiff and barky until the effects end.

Undead

You have Feasted on an Undead, gaining resistance to Necrotic damage until the next time that you Feast on a creature. Additionally, your jaw becomes slack and you gain a slight decaying stench until the effects end.

Monstrous Rage

Starting at 6th level, you gain an additional bonus effect from the Feast feature while raging.

Aberration

You have Feasted on an Aberration. While raging, you gain 30 feet of telepathy.

You can use your Telepathy to communicate mentally with another creature within 30 feet. The contacted creature doesn't need to share a language with the you to communicate in this way with it, but it must be able to understand at least one language. A creature without telepathy can receive and respond to the telepathic messages but can't initiate or terminate a telepathic conversation.

You need to see the creature in order to initiate the telepathy and can end the telepathic contact with a bonus action. The contact is broken as soon as the you and the creature are more than 30 feet from each other, if you contact a different creature within range, or if either you or the target are incapacitated. You must use a bonus action in combat to initiate, terminate, or participate in a telepathic conversation while the you are not incapacitated.

Beast

You have Feasted on a Beast. While raging, you gain a bite attack that you are proficient with. It deals 1d6 piercing damage on a hit. Once on each of your turns when you damage a creature with this bite, you regain a number of hit points equal to your proficiency bonus, provided you have less than half your hit points when you hit.

Celestial

You have Feasted on a Celestial. While raging, you gain a 15 foot flying speed.

Construct

You have Feasted on a Construct. While raging, you can reroll a 1 or 2 on melee weapon damage die once per turn. You must take the new result when doing so.

Dragon

You have Feasted on a Dragon. While raging, You gain a bonus to your Armor Class equal to your Proficiency Bonus minus 2.

Elemental

You have Feasted on an Elemental. While raging, you can cast the absorb elements spell at will. The casting of this spell counts as nonmagical, so it can not be counterspelled and bypasses the Rage limitation of spell casting.

Fey

You have Feasted on a Fey. While raging, you can cast the misty step spell once (per rage). The casting of this spell counts as magical, but bypasses the Rage limitation of spell casting.

Fiend

You have Feasted on a Fiend. While raging, you gain immunity to fire damage.

Giant

You have Feasted on a Giant. While raging, you become Large, along with anything you are wearing. If you lack the room to become Large, your size doesn’t change. Additionally, one of your attacks with a weapon or an unarmed strike a turn can deal an extra 1d4 damage to a target on a hit.

Humanoid

You have Feasted on a Humanoid. While raging, you can make an additional melee weapon attack as a bonus action on your turn, a number of times equal to your Constitution Modifier per rage.

Monstrosity

You have Feasted on a Monstrosity. While raging, your melee weapon attacks deal extra poison damage equal to your Proficiency Bonus.

None

You have yet to feast on a creature.

Ooze

You have Feasted on an Ooze. While raging, any creature who hits you with a melee attack takes Acid Damage equal to half of Your Proficiency Modifier (rounded up).

Plant

You have Feasted on a Plant. While raging, you are immune to the prone and poisoned conditions while on the ground.

Undead

You have Feasted on an Undead. While raging, the first time you are reduced to 0 hit points but not killed outright, you can drop to a number of hit points equal to your Constitution Score instead.

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Monster Chef

At 10th level, you are able to extend the benefits of your monstrous stomach to your allies. When a creature consumes you Banquet during a Short Rest, they also gain the bonus effect based on the creature type eaten until the next time they long rest from your Feast feature (not the Evolved Stomach feature). 

Evolution

Beginning at 14th level, your body has become perfectly accustomed to the consumption of monsters. You gain the following benefits:

Evolved Feast. You no longer lose the benefit of the Feast feature when you Feast on a new creature. If you Feast upon a creature that you already possess the bonus effect of, you can instead gain Temporary Hit Points equal to your Constitution Score plus your Proficiency Bonus. You can also now use Feast a number of times equal to your Constitution Modifier per long rest.

Evolved Hunger. You can also now use your Feast feature on creatures who die within 15 feet of you, moving within 5 feet of them without provoking opportunity attacks with that same reaction.

Evolved Cooking. You no longer need to roll in order to harvest monster parts for your Banquet feature. Additionally, creatures who eat your Banquet food can no longer roll lower than your Constitution Modifier on hit die.