Warrior of the Ooze Prince

a monk subclass inspired by the abilities of the ooze creature type and Juiblex with warlock adjacent features

Level 3: Liquefy Body

At the start of your turn, you can spend 1 focus point to change your body into a liquid form, this effect lasts for 1 minute and ends if you gain the incapacitated condition. During that time you gain the following effects:
Fluidity: Your body can twist and shape in form, you're see-through and malleable, you can have any configuration of arms and legs as long as it doesn't exceed however many you naturally have, for most races, this is at 2 or less arms and legs
You can fit through any opening bigger than 1-inch wide provided you aren't wearing armor.

Engulf: You can pass through another creatures space as if it were difficult terrain.
When you enter a creature's space, you attempt to grapple them as long as they're not more than 1 size larger than you, when you grapple a creature this way, it leaves your limbs free. A creature can only be targeted by a grapple attempt this way once per turn and you can only grapple one creature at a time this way. You cannot end your turn in a creature's space unless they are grappled by you

Dissolution: When you grapple a creature, they take your choice of necrotic, poison or acid damage equal to one roll of your martial arts dice upon being grappled and at the end of their turn if they are grappled by you

Creatures grappled by you can attempt to break free using their bonus action instead of their action, but they can only attempt to break free once per round.

Level 3: Faceless

you can cast the Disguise Self and Alter Self Spells once per long rest

Level 6: Will of Erasure

Your heightened devotion to the lord of oozes allows you to embody more of his power, You gain the following abilities:

-By Lord of Nothing: Your unarmed strikes always deal your choice of poison, necrotic or acid damage, regardless of magic items or class features, you also grow a number of extra slimy appendages equal to your proficiency bonus that can be used to make unarmed strikes and grapple creatures, these appendages make you count as two sizes larger for the purposes of shoving and grappling creatures.
-When you activate Liquefy Body, you can expend an additional focus point to choose two of the following damage types: necrotic, acid and poison, you ignore resistance to the picked
damage types for the duration, and immunity to them is treated as resistance.

-Elastic Strike: When you take the attack action or use a feature that allows you to make multiple attacks, you can replace up to two of the attacks with special unarmed strikes, these unarmed strikes have an extra 15ft of reach and can both damage and grapple a creature at the same time, if a creature is grappled by this feature they are immediately pulled to your own space if available, or any space of your choice within 5 ft of you if not and remain grappled.

-Grasp of the Faceless:You can move creatures grappled by you without expending extra movement.
-You have advantage on attack rolls against creatures you are grappling.
--your grapple/grapple escape save dc gains a bonus equal to half of wisdom modifier (minimum of 2).

If you took the "Grappler" feat at an earlier level, you may replace it with a different feat.

Level 11: Envoy of the Fetid Prince

 

You have proved yourself worthy of direct acknowledge from the slime father, you gain the following abilities: 

Stare into the abyss: once per long rest, you can cast the spell "contact other plane", when you do so, you automatically succeed but you can only contact Juiblex or the entity that provides you your power.

Mastery of Ooze: While in liquid from, You gain resistance to poison, necrotic and acid damage, immunity to the poisoned and grappled conditions and gain advantage on effects that inflict the restrained condition.

Additionally, your unarmed strikes gain a +5ft to their reach.

Rubbery Rebound:  Once per long rest,when you hit a creature you are grappling with a melee attack, you can force them to make a strength/dexterity (your choice) save against your grapple save dc, on a failure you fling them up to 50 ft directly away from you as long as there is a wall or immovable object within their travel distance, any creatures caught in their path are moved alongside them, when the creature and any other moving alongside them collides with a wall or another stationary object that cannot be moved they take 1d6 bludgeoning damage for every 5ft traveled and are knocked prone, the creatures then either immediately bounce back horizontally to any space of your choice within 10 ft of yourself and remain grappled by you if they were before, or you can directly move towards the point of collision alongside any creatures you are currently grappling. either way after one of the effects happens every creature in a 20ft sphere centered on yourself takes your choice of poison, necrotic or acid damage equal to three rolls of your martial arts die + your dexterity modifier.

On a success, nothing happens but the use of this feature isn't consumed, you regain your use of this feature when you finish a short/long rest or when you use Uncanny Metabolism.

Level 17: Avatar of the Indescribable

Foul Slick: when you activate Liquefy Body, choose a number of creatures that can see you equal to your proficiency bonus, they make a wisdom saving throw against your focus save dc, on a fail they gain the poisoned and frightened conditions, which last until they get at least 60ft away from you.

Swamp of oblivion: While you are in liquid from, you exhume a 20ft emanation of slime, enemy creatures have their speed halved upon entering the space and gain a -2 penalty to AC and saving throws.

Dissolute Filth: Creatures grappled by you take damage equal to two rolls of your martial arts dice instead of one, additionally, when a creature you are grappling dies, you can expend 1 focus point to gain an amount of temp hp equal to your total dexterity score.

Improved Rubbery Rebound: if you have no uses of Rubbery Rebound, you can expend 4 focus points to use it, you no longer take any damage from using rubbery rebound.