Your Constitution Increases by 2 and two other ability scores of your choice increase by 1, but your Dexterity decreases by 2.

Oozekin, as far as anyone knows, have no natural end to their lifespan. They are more likely to die of unnatural causes.

Oozekin have no predisposition towards any particular alignment but as they learn from the company they keep, they usually develop a similar alignment.

Your Size is Medium. You have the ability to condense yourself down to Small size at will though.

You have a Walking Speed comparable to most humanoids of 30 feet. Additionally, your viscous and sticky form gives you a Climbing Speed of 30

As an Ooze, you have no eyes, but are highly sensitive to vibrations of displaced air in your vicinity. You have Blindsight out to 60 feet, outside of which, you cannot see.

Oozes are predators highly specialized to lie in wait, unseen, before smothering their prey with superior strength. You have proficiency in Athletics and Stealth. You also have advantage on Stealth checks made while remaining still, able to camouflage yourself to blend into your surroundings. 

Newborn Oozekin are fluent in Ooze, a rudimentary "language" whereby Oozes communicate basic concepts like "food this way", "predators near", etc. , through the exchange of fluids. However, Oozekin quickly pick up the first language they happen to be exposed to, which is usually Common.

Your body isn't limited to a specific form like those strange bizarre rigid beings. This grants you incredible adaptability and resilience against forms of harm that would be lethal to most creatures.

• You can store objects inside your body (This doesn't render them immune to acid damage though)
• You are able to squeeze into and through spaces as narrow as 1 inch wide without squeezing, and are immune to non-magical grappling and restraint, unless fully enveloped.
• You have resistance to non-magical Bludgeoning, Piercing, and Slashing
• You can, at will, adopt a humanoid form or humanoid monstrosity form. For this form to pass casual scrutiny however, you must observe a humanoid / humanoid monstrosity for 1 minute, after which you can assume a form visually identical to that creature, as if by the Disguise Self spell

Your viscous liquid body acts like an adhesive rubber providing you with a few additional benefits:

• Sticky - You have advantage on checks to Grapple / Restrain targets. Upon successful unarmed strike, you may, as a Bonus Action, initiate a Grapple attempt.
• Springy - You can jump twice as high and you take falling damage for every 20 feet you fall, rather than every 10.
• Stretchy - You can reach twice as far, striking from twice as far away or reaching twice as high vertically.

Your Body is composed entirely of a viscous acid. As a result, you are unable to make use of armor or weapons. However, you acquire the following benefits:

• You are Resistant to Acid Damage and have advantage on Saves against effects that inflict it.
• Your unarmed strikes inflict an additional 1d6 + CON acid damage (You are proficient). This increases to 1D8, 1D10, 1D12, and 2D6 at 5th, 10th, and 15th, and 20th level respectively. Grappled creatures take this damage at the start of their turn as well.
• You may use your action to Engulf a creature. You make an STR (Athletics) Check, opposed by your opponents STR (Athletics) or DEX (Acrobatics) check. If the creature is larger, they have advantage. Upon successful engulf, you enter the creature's space, they take twice the dice in acid damage from contact, the creature is Restrained, and half of all damage inflicted on you is inflicted on your engulfed opponent. If the creature is your size or smaller they are Suffocating. Your action must be spent to maintain this effect, or it immediately fails.
• Non-magical weapons and armor that makes contact with your body is damaged, reducing their effective damage / AC by 1. If this reduction reaches 5, the object is destroyed. You can additionally burn through organic and non-magical metal as an Action, at a rate of 2 inches / round.
• You can cast Acid Splash and Corrosive Spray (Poison Spray w/ Acid Damage) using CON as your Spellcasting Statistic. You can also expend 1 Hit Point over 1 minute to create a tiny Ooze creature that behaves like a familiar from the Find Familiar Spell. It shares your non-combat racial characteristics, and uses your DEX, CON, INT, WIS, and CHR Scores, but otherwise has 1 STR. This is less a summoned creature and more a physical extension of yourself and you can only have 1 at a time 

While your liquid properties make you highly adaptable and resistant, they also are a source of vulnerability.

• You have Disadvantage on checks to resist Extreme Heat and Cold, as you are prone dehydration and freezing. Additionally, being subjected to Fire or Cold Damage reduces your speed by 10 for 1 round.

• You are highly vulnerable to large quantities of water, as dilutive forces quickly rip your body apart. Every turn you spend in contact with a large quantity of water (ie: lakes, oceans, rain) you take necrotic damage, starting at 1 damage the first round, and doubling each subsequent round still in contact with the water. If your hit points are lowered to below half your maximum, your movement speed is halved and you are considered poisoned until you recover to above half you hit point maximum. If you are reduced to 0 hit points by this effect you die.