The Monstrous Sewage

Succumbing to its vile yet alluring nature, you have thrown away regards to simple common sense and consumed some of the Monstrous Sewage. A dark entity that manifests through the forgotten wastes of society into a hideous concoction of refuse and decay, it has enhanced your senses and capabilities at the cost of your vitality, and worse, your dignity. Though you are cursed with an endless hunger for the garbage of this realm, you may be able to use this hunger to further your own, and the Sewage's, goals in your adventures.

Knowledge of Waste

Starting at 1st level, you can resistance to poison and acid damage, and immunity to disease.

Additionally, the Monstrous Sewage has granted you powers of heightened senses. After consuming garbage, decaying organic matter, or similar refuse, you become enlightened, granting you one of the following features based on what you primarily ingested:

-Animal Carcass: You can use the Dash action as a bonus action on your turn.

-Humanoid Carcass: You gain advantage on one saving throw or ability check of your choice.

-Sewage: As a reaction during combat, you can choose to gain resistance to the damage of one attack or spell.

-Decaying Plant Matter: You can use a bonus action to heal yourself for a number of hit points equal to your Charisma modifier plus your warlock level.

Once you use the benefit granted from this feature, it is lost until you consume more of the Monstrous Sewage.

Refuse Reserves

At 6th level, you begin to store savory bits of the Monstrous Sewage in the reserves of your digestive system for re-consumption in emergency situations. As a reaction, you can choose to forget your current Knowledge of Waste feature in favor of a different one, and then immediately use that feature as part of the reaction.

Once you use this feature, you can't use it again until you finish a short or long rest.

Repulsive Resolve

At 10th level, you learn to absorb more of the Monstrous Sewage's dark magics, some of which threaten to eat away at your body. You gain immunity to acidic and poison damage.

Additionally, while you have a Knowledge of Waste benefit available to use, you gain temporary hit points equal to your Charisma modifier plus your warlock level. These hit points refresh whenever you consume a Monstrous Sewage within the first hour after you finish a long rest. While you do not have a Knowledge of Waste benefit available to use, you lose the temporary hit points and suffer necrotic damage equal to your Charisma modifier at the beginning of each hour without a Knowledge of Waste benefit. Consuming some of the Monstrous Sewage before your next long rest will end the necrotic damage until you lose your Knowledge of Waste benefit again, but will not refresh your temporary hit points. You will not be affected by necrotic damage from this feature during a long rest.

Maw of Terror

At 14th level, you can quickly harvest the benefits of the Monstrous Sewage while in combat. Upon reducing a creature to 0 hit points, you can use the same turn to consume any matter within 5 feet of you that would grant you a benefit from your Knowledge of Waste feature. If you do so, you gain that benefit in addition to any other Knowledge of Waste benefit you currently have. The Knowledge of Waste benefit gained from this feature only lasts for the next two rounds, and you can have two stacks of the same benefit, but you cannot exceed one benefit from your Knowledge of Waste feature and one benefit from this feature.

If you consume matter using this feature, you can choose any creatures within 30 feet of you to make a Wisdom saving throw against your warlock spell save DC. On a failed save, they are frightened of you until the end of your next turn.