Devourer Patron

When you choose this subclass, you embrace the power that comes with the insatiable hunger of a demon lord or something even more terrifying from an eldritch abyss. This power is both a curse and a blessing. By seeking out the entity that granted you these abilities, you have inherited an unquenchable desire for more.

When you choose this subclass, you might be drawing power from entities such as "The Great Maw," "Nurgle," "Juiblex," "The Coven of the Golgari Swarm," "Yeenoghu," "The Eternal Hunger," "The Hungry Caterpillar", "Frank", "The Royal Carnage", "The Alcoholic Hippo", "The Ghoul Duchess" or other forces of hunger, devastation, and stagnation alike.

Whether you sought power, knowledge, or something else, your craving will never end. Your hunger knows no limits, and like the patron from whom you draw this curse, you will never be satisfied until you have devoured it all.

Insatiable

Starting when you choose this subclass, at the end of your turn, if you are not Incapacitated and there is a hostile target within 15 feet of you, you regenerate a number of hit points of value equal to your proficiency bonus plus one third of your Warlock level(rounded down).
Additionally, you now can cast the spell Purify Food and Drink at will without without expending a spell slot or material components, the benefits of this spell does not extend to anyone but yourself or other devourer patron warlocks.
The regeneration does not take effect if you are under an effect that prevents you from concentrating (such as the barbarian rage feature), its still works if you are concentrating in a spell.

The hunger calls to you, your appetite growing with your power, demanding to be fed. No meal is beyond your craving, and your tastes are not easily satisfied, as well your tenacity to hunger for more that keeps you going.
You instinctively feed on the ambient energies of conflict and desperation. Whether by siphoning the essence of nearby enemies, gorging on latent magical energy, or indulging in your own bloodlust.
Nothing is repulsive enough, and no meal is refused by your body.

Growing Hunger

Your newly acquired diet and tastes have made your body much more resilient and robust. When you choose this subclass, your Hit Point maximum increases by 3, and it increases by 1 whenever you gain another Warlock level.

The pact you’ve forged with your Patron has warped your body into a grotesque machine of consumption. No meal is refused, and no substance, however vile or unnatural, is not beyond your capability to devour. Your body and mind absorb what they consume, metabolizing even the indigestible to fuel your unnatural vitality. Rot, bones, metal, shards of glass, even magic, emotions, or cursed remnants, become sustenance, fusing with your body in horrifying ways to reinforce your durability.

 

- Level: 17

 At 17ht level you receive a increase of 5 maximum hit points.

You are getting closer to the greatness you so sought receiving from your patron the a "Gift", continue to devour until there is nothing more.

- Level: 20

At 20th level, your maximum hit points increase by another additional 5.

Your form grows even more robust as you reach the apex of your opulence, embodying the boundless hunger granted by your patron.

However, this newfound vitality is not a sign to temper your indulgence it is a mandate to consume even more! Your insatiable hunger deepens, demanding greater sustenance to sustain the overwhelming power you wield.

This final gift is a reminder that your pact is eternal, and your feast must never end.

Devourer Spells

The magic of your patron ensures you always have certain spells ready; when you reach a Warlock level specified in the Devourer Spells table, you thereafter always have the listed spells prepared.

Devourer Spells

Warlock Level	Spells
3	Tasha's Caustic Brew, Gentle Repose, Absorb Elements, Ray of Sickness
5	Hunger of Hadar, Vampiric Touch
7	Evard's Black Tentacles, Vitriolic Sphere
9	Immolation, Insect Plague

Food Chain

Starting at 6th level, As an bonus action, you can consume the corpse of a creature that died within the last hour or is under the effects of the Gentle Repose spell that is at your touch reach. You receive the effect of the False Life cast at a level equal to half the CR of the consumed enemy rounded down, up to 9th level, if the value is bellow 1 this ability has no effect.
At 17th level, you instead receive the effect of the False Life cast at a level equal to 1 + half the CR of the consumed enemy rounded down, up to 9th level.
Additionally, you are becoming more resilient and accustomed to enduring your own pain. 

You can absorb the vitality and essence of the fallen to increase your own resilience, the consumption is a grotesque spectacle. Flesh dissolves under your touch as though devoured by unseen forces, or your body contorts unnaturally as you absorb the essence directly. Some corpses shrivel to husks, collapse into ash, or implode entirely, leaving behind a faint aura of gluttonous satisfaction as the magical energy surges into you.

What Doesn't Kill Me

At 10th level, Your emit a dark protective aura in a 15-foot Emanation that originates from you, whenever a creature within this emanation takes damage from a source that does not affect you at the same time, you can use your reaction to halve the damage that creature would take (rounded down), redirecting to you that same amount of damage, this damage cant be reduced in anyway.
The aura is inactive while you have the Incapacitated condition.
If you have any multiclass level the amount of damage you can absorb goes down to one third.

At 17th level you grow familiar with pain, once per long rest you can choose to ignore half of the damage redirect, at 20th you can use this benefit twice per long rest.

Your insatiable hunger becomes a dark, protective force of ravenous energy that surrounds you, devouring harm meant for others and shielding them from danger, as your power grows so to does your tolerance to pain.

Eternal Meal

At 14th level, as a bonus action, you can enter a state of insatiable hunger that warps both your body and mind, turning you into a terrifying force of consumption for 1 minute. As you unleash this hunger, your presence becomes impossible to ignore, devouring the the body, attention and very will of your preys.
While this feature is active, you gain the folowing benefits:
You can not enter this state if you are under an effect that prevents you from concentrating (such as the barbarian rage feature), you can still enter this state even if you are concentrating on a spell.

• Predigestion: While this feature is active, the targets you hit with an attack roll or any Warlock spell that deals acid damage must make a Constitution saving throw against your Warlock spell save DC. On a failure, their AC is reduced by 1, for 3 turns, as acid bile and/or the strength draining effects of your curse stiffen their movements. 
  Each use of this ability further reduces the target's AC and resets the duration of the effect to 3 turns.
  A creature can only be affected by this effect once per turn.
     At 17th level, the target, on a failed saving throw, has disadvantage on its next saving throw. At 20th level, the AC reduction increases to 2.
  
  

• The Main Course: While this feature is active, creatures of your choice, which must be able to see or sense you, within a 30-foot emanation that originates from you, must succeed on a Wisdom saving throw against your Warlock spell save DC. On a failure, they are compelled to move toward you with their full movement at the start of their turn, drawn by an irresistible supernatural pull to get closer and be devoured, creatures that succeed on the saving throw act normally and gain immunity to this effect for 24 hours.
      At 17th level the emanation increases to a 40-foot emanation, at 20th level creatures affected have disadvantage to hit you.
  
  

• Dig In: While this feature is active, you advantage on melee spell attack rolls. Additionally, when a creature provokes an opportunity attack, you can cast those spells as a reaction, sinking your ravenous power into them.
     At 17th level those spells deals a additional extra 2d6 acid damage, At level 20th they gain an extra 3d6 acid damage for a total of 5d6 Acid damage.

This feature ends early if you have the Incapacitated condition or when you choose to end it (no action required).
Once you use this feature, you can’t use it again until you finish a Long Rest unless you expend a Pact Magic spell slot (no action required) to restore your use of it.