Ghaunadans, because they lack a true sceleton, have difficulties excerting strength, but because of their amorpous body, they are also tougher than creatures of their size.
Also, because of their carefully created body, that also heals from injuries with no scars left behind makes them more charismatic and depending on their mindset, they can also focus their mind towards either wisdom or just sheer intellectuality.

Because of these traits, their strength score is decreesed by 2, constitution score is increased by 2, charisma score is increases by 2 and they can chose to increase their Intelligence score or Wisdom score to be increased by 1.

Because of their sharper mind and their focus on trying to understand the world, they are often proficient in the fields of Deception, Insight, Perception or Persuasion.

You can speak, read, and write in the language, that is most common around your birthplace and have an instinctual knowledge of Undercommon or Abyssal.

You have a specific coloration based on your origin. Choose one type of color from the table. Your special attack's damage and form is determined by the color, as shown in the table.

Ooze Origin

You can use your special ability as a bonus action. Your ooze origin determines the size, shape, and damage type of the ability. When you use your ability, each affected creature must make a saving throw, the type of which is determined by your ooze origin. The DC for this saving throw equals 8 + your Stat modifier + your proficiency bonus. A creature takes 2d4 damage on a failed save, and half as much damage on a successful one OR as a blue ooze, heal 2d4+2. The damage increases to 3d4 at 6th level, 4d4 at 11th level and 5d4 at 16th level OR as a blue ooze 3d4+3 at 6th level, 4d4+4 at 11th level and 5d4+5 at 16th level. The action use count is based on your origin and your level.

You can make a pseudopod attack against a target within 10 ft. range (STR DC {{savedc:dex}}, half damage on success) for 2d4 Bludgeoning Damage [6th] 3d4, [11th] 4d4, [16th] 5d4

You are immune to poison damage.

You have resistance to the acid, piercing and slashing damage types.

The ghaunadan is immune to any spell or effect that would alter its form.

Due to your original body's traits, you're immune to the following conditions: poisoned, blinded, deafened, exhaustion, grappled, paralyzed, petrified, prone, restrained, unconcious.

You're vulnerable to cold damage, if you take cold damage, your speed is halved.

Ghaunadans are able to recover faster if they have enough matter to be absorbed, consuming double food for a day (24h) or a living creatures with similar nutritious value allows them to restore an additional 1d4+1 HP with each short or long rest they take.

In addition to that, if they are a spellcaster, they can consume an arcane focus as a full turn action to restore half their spell slots (rounded down) once per long rest.

Most ghaunadans grow fast, but their growth speed is often related to the amount of usefull material they can absorb. They can form their conciousness and humanoid form as early as 8-10 years old, but with scarce resources or in case of the healing type, that has significantly lower absorption rate because of the change in it's destructive essence, it can take up to 20-25 years to be able to grow large enough to attempt the change.

Ghaunadans can take on the shape of any small or medium sized humanoids. Your size is similarly Small or Medium.

Your base walking speed is 30 feet, but you can also burrow into the ground or small cracks and move with a speed of 10 feet, climb on any surfaces with a speed of 20 feet or swim with a speed of 40 feet.

As an action, you can change between your ooze and humanoid form.

Ghaunadan have no true eyes with which to see, however they can still perceive their environment out to a range of 60 ft. through Blindsight, and a range of 120 ft. through Tremorsense. Beyond that however they are blind.