Path of the Devourer

Hunger, flesh between teeth, marrow between molars, and blood, beautiful, fresh, blood... These days, it's difficult to think about anything else. There is something deep and ravenous within you, gnawing at your stomach and tensing your muscles into action. Meat, bone, scales, stone, it doesn't matter as long it is consumed... The Path of the Devourer Barbarian draws their strength from the corpses or items of those they've consumed, obtaining a fraction of its essence and depending on the nature of the beast or material eaten, gaining a number of abilities that correspond to what now sates them. A barbarian like this comes about for any number of reasons; possession, divine or infernal influence, cannibalism, or simply pure carnal gluttony. Regardless of the circumstances, they need to eat, and woe be to anyone who finds themselves between the presence of a voracious Devourer and their next meal...

Insatiable Maw

As you follow down the Path of the Devourer, you've learned that your teeth are your deadliest asset. Starting at level three, your teeth sharpen to the point of daggers, allowing you to use them as a formidable weapon. Your teeth become natural, simple weapons that you are proficient with. You can bite other creatures with them, dealing 1d6+Strength modifier piercing damage on a hit. Additionally, using a reaction, you can choose to gain a number of temporary hit points based equal to half the damage dealt. You can use this feature a number of times equal to your proficiency bonus and regain all expended uses upon taking a long rest.

The damage of your bite scales with your level , increasing to 2d6+str at level 6, 3d6+str at level 10, and 4d6+str at level 14.

Visceral Consumption

To you, the acting of feeding is about more than just filling your stomach. Every time you feed, you make what once was a part of you, taking its essence and using its power for yourself. Starting at level 3, you gain the ability to eat creatures over the course of a short or long rest and obtain their Viscera. A Viscera can be one proficiency, resistance, or physically-related ability of the creature's that appears on their stat block (such as an Ettercap's web attack or a Bullette's deadly leap). Much like a wizard that learns spells from scrolls, Devourers can learn an infinite number of Viscera and can memorize them in their Rapacious Repertoire. Like spells, you can only have a limited number of Viscera prepared at a time. However, unlike spellbooks that are physical objects, your Rapacious Repertoire is mnemonic and therefore immaterial. The only way to be disarmed of your Repertoire is to suffer memory loss.

You have one Viscera slot and gain more as you level up (2 Viscera slots at 6th level, 3 Viscera Slots at 10th level, 4 Viscera Slots at 14th level). Each Viscera remains in your Viscera slot until you choose to prepare another by taking a long rest. If you choose to take abilities that require an action from a stat block, you can use those abilities a number of times equal to your Constitution modifier before taking a long rest, regaining all expended uses once completed. Should you take a passive ability from a stat block, it remains active so long as it is prepared using a Viscera slot. The number of times you can use these abilities is shared between Viscera, meaning that if your Constitution modifier is +4, then you can use any combination of those abilities a total of 4 times. The maximum CR of the creatures that you can consume is half of your barbarian level rounded down, and the maximum size of the creatures you can consume is small. At higher levels in this class, the maximum size of the creatures you can consume increases.

At 6th level, you can consume creatures of the same size as you and smaller, at 10th level, you can consume creatures one size larger than you can smaller, and lastly, at 14th level, you can consume creatures two sizes larger than you and smaller.

Bloodlust

Nothing is beyond your hunger, and nothing will escape your jaws. Insatiable Maw counts as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Additionally, when you use Insatiable Maw, you may spend a number of hit dice less than or equal to your Constitution modifier and add the number rolled to the damage of the attack as necrotic damage. You can use Bloodlust once per long rest, and an additional use of the feature 10th level (2 uses) and 14th level (3 uses).

Sapid Essence

Beginning at sixth level, in addition to obtaining Viscera when consuming a creature, you also obtain their Essence. Essences have two different applications, Savoring and Digesting,  each of which depends on the creature type consumed. When you choose to Savor a creature's essence, you gain a passive effect based upon their creature type found in the Sapid Essence table. This passive ability remains in effect until you consume another creature of a different type, choose to Digest the creatures Essence, or take a long rest. When you choose to instead Digest a creatures Essence, the passive effect fades, and in it's place, you obtain an active ability that corresponds to the corpses creature type which can be found in the Sapid Essence table. Once you use the ability that corresponds to the creature's type, the essence is consumed and you cannot use the ability again unless you choose to digest another creature of the same type.

Stomach of Steel

Your appetite has extended beyond flesh and into the realm of the inorganic, allowing you to consume steel and stone alike. You can now consume magic items and extract their Materia, gaining one ability from the item and adding it to your Rapacious Repertoire. You have one Materia slot and gain more as you level up (2 Materia slots at 14th level). Much like Viscera abilities, Materia remains in your Materia slots until you choose to prepare another by taking a long rest.

If you choose to take abilities that require an action from the item, you can use those abilities a number of times equal to your Constitution modifier before taking a long rest, regaining all expended uses once completed. Should you take a passive ability from the item, it remains in effect so long as it is prepared using a Materia slot. Much like with Viscera abilities, the number of times you can use these abilities is shared between Materia.

Additionally, any curses, poisons, or expended uses the item has (should you choose to take an ability that requires charges) when consumed are transferred over as well. Should you expend the last charge of a Materia in your Repertoire, then it is forgotten and must be re-obtained by consuming an object with the same ability. If consuming the item would realistically cause you bodily harm, you have resistance to the damage and advantage on any saving throws that it would cause. Eating items in this way bestows no nutritional benefit and does not replace the need to eat edible material.

Adaptable Appetite

The abilities of the things you've eaten have become a natural part of you, settling into your muscles and burrowing into your bones. They have given themselves to you entirely. Beginning at 14th level, you gain the ability to swap out Viscera and Materia slots in the midst of combat while raging. As an action, you can choose to end your rage and swap out any number of Viscera and Materia you have prepared and replace them with others from your Rapacious Repertoire.

As an additional cost, you must forget an one learned Viscera or Materia and make a DC 20 Constitution saving throw. Should you succeed, you are able to re-obtain the Viscera or Materia so long as a creature or item of an identical nature is consumed. Should you fail, remove the forgotten Viscera or Materia from your Repertoire permanently.

You can use this feature once per long rest, and regain the expended use upon taking a long rest.