You have immunity to non magical slashing damage and  lightning damage,unless your size is tiny,and you are vulnerable to ice and thunder damage

when you are subjected to slashing or lightnig damage ,unless your size is tiny, you split in two puddings one size smaller,each one of the puddings has half of your current and maximum hit points

During a short or long rest you can fuse your parts back togheter regaining your normal hit points and increasing by one size

You count as an ooze instead of a humanoid

As a bonus action you can change your appearance as long as you mantain your size

you can move through a space as narrow as 1 inch wide without squeezing.

you can't wear any armor

you can use only weapons that you have proficency with

As an action when you are touching a creature equal to or smaller then you,you can engolf him in your body.when you have a creature in your body you can use a bonus action to digest dealing 1d4 acid damage

a creature engolfed is grappled and can make at the start of his turn a strenght saving trow to free himself ,DC equal to your constitution score, other creatures can make the saving trow too to free the creature

 Your constitution score increases by 2, your strenght score increases by 1 and your intelligence score decreases  by 2

you probably don't age

Cellular pudding's size depends on how much you eat:

You starting Size is medium

if you eat twice your weight you encrease by one size

if you don't eat for one day your size decreases by one

Your base walking speed is 30 feet.

you have a climbing speed of 30 feet and you can stick to any surface if you aren't wet

You don't see the world like other adventurers you  have a Blindsight of 120 feets but you are blind beyond this range you are immune to the blinded condition

You can speak Common