Otherworldly Patron: The Slime Lord

Not all Oozes are mindless. Many have gained power through various means. Your patron is a shapeless being of great power. Whether it be Juiblex, Demon lord and Lord of Oozes and Shapeless Things, An ancient Wizard, who studied Oozes to gain their power, or perhaps a mundane slime, which ascended through mysterious means, you have made a pact with a caustic creature of terrible strength.

Expanded Spell List

Spell Level	Spells
1st	Color Spray, Disguise Self
2nd	Gentle Repose, Melf's Acid Arrow
3rd	Protection from Energy, Stinking Cloud
4th	Conjure Minor Elementals, Vitriolic Sphere
5th	Cloudkill, Conjure Elemental

Slime Secretion

When you take this subclass at 1st level, you begin to secrete an acidic substance across the surface of your skin. Unarmed attacks deal acid damage equal to 1d4 + your Charisma modifier. Additionally, when grappling, any creature in contact with your skin takes your unarmed damage at the beginning of their turn. Your unarmed damage increases to 1d6 at 5th level, 1d8 at11th level, and 1d10 at 17th level.

Fluid Motion

Also at 1st level, your motions become more fluid, and flexible. when not wearing armor, and not weilding a shield, your armor class is now 10 + your Dexterity modifier + your Charisma modifier. Additionally, when grappling a creature, you may use your Charisma Modifier + your Proficiency modifier, in place of Athletics (Strength)

Slime Specialization

At 6th level, you may choose a type of slime from the many types your patron has consumed, to take a specialized trait from:

Blood Ooze: When you take the attack action, you gain temporary HP equal to half the damage dealt on your first attack.
Foxfire Ooze: When a creature hits you with a metal weapon, they take lightning damage equal to your unarmed damage
Gelatinous Cube: As an action, you may make yourself transparent for 1 minute, gaining advantage on stealth checks. You may do this once, and regain the ability to do so at the end of a long or short rest
Gray Ooze: Any nonmagical weapon made of metal that hits you corrodes. After dealing damage, the weapon takes a permanent and cumulative -1 penalty to damage rolls. If its penalty drops to -5, the weapon is destroyed. Nonmagical ammunition made of metal that hits you is destroyed after dealing damage.
Purple Slime: You gain the ability to inject your foes with a necrotizing enzyme. Make a melee weapon attack. On a hit, the creature must make a Constitution saving throw. On a failed save, they take 2d6 poison damage, and their Strength Score is reduced by 1. You may use this ability once, and regain the ability to do so on a long or short rest.

You may choose to change your specialization at the end of a long rest, gaining the benefits of another option.

Malleable Form

Your body continues to take on attributes of an Ooze, becoming more malleable, and adhesive. You gain a climbing speed equal to your walking speed, While climbing this way, you can move up, down, and across vertical surfaces and upside down along cielings, while leaving your hands free. Additionally, you gain resistance to acid damage, and your unarmed attacks have a range of 10 ft.

Engulf

Starting 14th level, your body, despite retaining it's shape, has fully become that of an ooze. You can move through spaces as narrow as an inch without squeezing, and gain immunity to acid damage. Additionally, when you are grappling a creature, you may use your action, attempting to engulf them in your near-liquid form. Make an unarmed attack against the creature. On a successful hit, the creature is engulfed. While engulfed, the creature is restrained and takes your unarmed damage at the beginning of their turn. While a creature is engulfed, you may use your bonus action to make an unarmed attack with advantage. The creature may use it's action to make an Athletics (Strength) check to attempt to break free. On a success, they are no longer engulfed, but they are still grappled. If the creature succeedds on it's check by more than 5, it is no longer grappled.

Pact of Hunger

Your patron has blessed you with the ability to eat the flesh of your foes to gain a semblance of their power. As an action, you may consume a portion of raw meat from a non-humanoid creature that is not a construct, which you helped to defeat. You may choose a single aspect of that creature to assume for 1 hour. The features you may choose are as follows:

A trait enhancing a single sense, such as Keen Sight, Dark Vision, Blindsense, etc.
A +1 to the creature's highest stat
A damage resistance. If the creature has multiple damage resistances, you may choose only one.

You may only have a single aspect active at any given time, and can only choose each aspect once, and regain the ability to choose it after a short or long rest. If you consume another serving of flesh, you lose the previous aspect. You may only gain an aspect from a creature once. A second portion of flesh from the same creature has no effect. If a portion has been allowed to rot, when you consume it, you must roll a Constitution save. On a failed save, the consumption fails, and you lose the meat portion.

Invocations

Pseudopodia

Prerequisites: Slime Lord Patron, 6th level
You are able to temporarily form two pseudopodia to attack with. As an action, grow two pseudopods, which last for one minute. For the duration, you can use your bonus action to make two additional unarmed attacks, and gain advantage on grapple checks. You may use this ability once, and regain the ability to do so on a short or long rest.

As above

Prerequisites: Pact of Hunger, 8th level
When consuming the flesh of a creature with a fly speed, you may choose to gain a fly speed equal to your walking speed.

So Below

Prerequisites: Pact of Hunger, 8th level
When consuming the flesh of a creature with a burrow speed, you may choose to gain a burrow speed equal to your walking speed. Additionally, when consuming the flesh of a creature with a swim speed, you may choose to gain a swim speed equal to your walking speed, and the amount of time you can hold your breath is doubled.

Corrosive Secretion

Prerequsites: Slime Lord Patron, 6th level
As a bonus action, you may touch a weapon, leaving your acidic essence on it. For the next minute, attacks made with this weapon deal an additional 1d6 acid damage. You may do this a number of times equal to your Charisma modifier, and regain all uses at the end of a long rest.

Offensive Eater

Prerequisites: Pact of Hunger, 5th level
When consuming a creature with a non-weapon attack action (Breath Weapon, Acid Spray , Web, etc.) you may choose to gain that action. Damaging attacks deal a number of d8 equal to your proficiency modifier in damage. You may use the special attack a number of times equal to your proficiency bonus. Once used it is recharged on a d6 roll of 6. Any saving throws are based on your spell save DC.

Nutrient Absorption

Prerequisites: Slime Lord Patron, Pact of Hunger
You no longer eat the flesh of your enemies, you absorb the portion, Disolving it in your acidic form. You no longer need to make a Constitution save when eating a rotted meat portion.

Oozing Companion

Prerequisites: Slime Lord Patron, Pact of the Chain, 3rd level
You may select a Gray Ooze to be the of form your Pact of the Chain familiar.

Shared Meal

Prerequisites: Pact of Hunger, 5th level
You gain the ability to cast Hunger of Hadar at 3rd level without expending a spell slot. You regain the ability to do so when you finish a long rest.

Live Meal

Prerequisites: Pact of Hunger, 12th level
When grappling a target, you may choose to make an unarmed attack, biting the creature and consuming its flesh. On a hit, you may choose an aspect of the target to assume.

Gluttonous

Prerequisites: Pact of Hunger, 14th level
The number of aspects you may assume goes up to two. You must consume two separarate meat portions to do so. If you consume another meat portion, you must choose one of the two active aspects to lose.

Caustic Casting

Prerequisites: Slime Lord Patron, Pact of the Tome, 5th level When casting a damaging spell of first level or higher, which requires an attack roll, you may use your reaction to deal an additional 1d6 acid damage.

Cannibalize

Prerequisites: Pact of Hunger, 12th level
You may now consume the flesh of humanoid creatures to gain their power. In addition to previous options, when consuming the flesh of a humanoid, you may choose one of the following aspects to assume:

A skill proficiency
A spell or trait granted by the creatures race
The superficial appearance of the creatures race

Additionally, when consuming the flesh of a spellcaster, you may choose to gain a fraction of their spellcasting abilities. When you do so, you gain a number of spell levels equal to your proficiency bonus. You can use these spell levels to cast spells which the creature knew. You use the casting ability of the creatures class (Intelligence for Wizard, Charisma for Warlock, etc.)

Blade of The Slime Lord

Prerequisites: Slime Lord Patron, Pact of the Blade
When you take the attack action using your pact weapon, the first attack deals an additional 1d6 acid damage.