The Souleater

You have made a pact with the monstrous abomination, Karybdiss. This colossal, hydra-like beast is so bloated it is incapable of moving from its putrid subterranean lair within the Pit of Scales. Possessed of an insatiable hunger for souls, Karybdiss is reliant upon its minions—the Fangs of Scyllia cult—to keep it sated with stolen mortal spirits. Karybdiss is a  creature of immense supernatural power, and it holds near-absolute control over the cult’s acolytes, but it revels in empowering its greatest servants—warlocks with a modicum of its ravenous power.

Expanded Spell List

The Souleater lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Souleater Expanded Spells

Spell Level	Spells
1st	command
2nd	magic mouth
3rd	bestow curse, stinking cloud
4th	confusion, black tentacles
5th	dominate person, cloudkill

Terrifying Aura

Starting at 1st level, as a bonus action you may emanate an air of psychic terror in a 15 ft. radius, lasting for 1 minute. When a hostile creature comes within range of your aura, they must succeed on a Wisdom saving throw against to your Spellcasting DC or suffer an effect from the table below, roll the d8 for each affected creature. Each creature can only be affected by this feature once every 10 minutes. You can do this a number of times equal to your proficiency modifier and you regain all uses when you finish a long rest.

 

D8	AURA EFFECT
1	The character loses attention as their mind seems to skip for a moment, causing their next attack to have disadvantage.
2	A crippling dread washes over the creature, and they are struck speechless for their next action.
3	The creature is terrified at the mere sight of you. They must use their movement to move as far away from you as possible on their next turn.
4	The creature feels nauseous, its movement speed is reduced to 0 until the end of it’s turn.
5	The creature is overcome with rage and must use their next attack on the nearest creature.
6	Horrific thoughts flood the target’s mind. They have disadvantage on saving throws until the end of their next turn.
7	The creature cowers in fear, immediately dropping their weapon.
8	The creature is stunned until the start of its next turn.

Hallucinatory Magic

Beginning at 1st level, when you cast a spell that targets only one creature, you can choose to cast the spell subtly into the mind of your target, causing the casting of the spell and its  effects to only be visible to the target. If the spell deals damage, it deals an additional 1d4 psychic damage. You can do this a number of times per long rest equal to your Charisma modifier (minimum of 1).

Soul Shackle

At 6th level, as a reaction, you can use an eldritch tether to chain the soul of a recently killed creature within 5 ft. to yourself. This creature must have an Intelligence of 3 or higher and have been killed within the last 10 minutes. You are able to store a number of souls equal to your warlock level. While you are storing these souls, the essence of Karybdiss gnaws away at your existence, preventing you from sleeping while taking a long rest. This causes your long rest to only restore your spell slots and hit points, and prevents any exhaustion level reduction. Additionally, you must take a DC 10 Constitution saving throw to avoid increasing your exhaustion level by 1. This saving throw's DC increases by 1 for each day that the Warlock makes the save.

You can then “devour” these bound souls to produce a variety of effects:
• Devour 2 souls to cast a known cantrip as a bonus action (cannot be used if you cast another cantrip this turn).
• Devour 5 souls as a bonus action to reduce your exhaustion level by 1.
• Devour 6 souls as a bonus action to regain a spell slot.
• Devour 10 souls as a bonus action to regain the use of an arcanum.

Devouring Cascade

At 10th level, your connection to Karybdiss grows even stronger, and you are flooded with the great Souleater’s profane power. You can cast the following spells as an action by gaining a level of exhaustion:

• Dimension Door
• Mass Cure Wounds
• Sending

Sacrifice Soul

At 14th level, once per short rest, you may force a target to make a Wisdom saving throw against your spellcasting DC. If your target is already charmed by you, they have disadvantage on the saving throw. On a failure, they become paralyzed and can repeat the saving throw at the end of each of their turns. If the creature remains paralyzed at the end of their third turn, Karybdiss consumes their soul, killing them instantly.