Your Constitution score increases by 2, and one other ability score of your choice increases by 1.

Slimefolk don't have a physical maturity per say and by other creatures standards, they are born physically matured. However, a slimefolk will take at three years to reach mental maturity beyond that of the standard behavior most oozes exhibit. As far as lifespan goes, slimefolk are not known to have one. Given their absence of recording their history and other races' disinterest in them it makes it hard to say how long a slime folk can or will live, their bodies not showing any signs of age or decay. For reference's sake, the oldest known slimefolk lived to be as old as an elf before perishing at about 700 years old.

 Slimefolk, despite some saying they naturally bend towards chaos and evil, tend towards no particular alignment. Rather, they adjust to the alignment of the society they are in. When they do form groups with other slimefolk, they tend towards the lawful neutral alignment, however, this is more of a structure for social cohesion more than a tenancy towards following rules.

Slimefolk vary in size, and even individual slimefolk can change their size by taking in or expelling water from their bodies, but in general, slimefolk are comparable in size to most other intelligent races. Your size is Medium.

Your base walking speed is 25 feet. You also have a climbing speed of 10 feet.

Accustomed to gloomy caverns and fungi lit caves. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

You have resistance to acid damage.

Due to the fluid nature of your form, you can move through a space as narrow as 1 inch without squeezing. You leave behind any items you are carrying, and any equipment which you are proficient with merges into your form until you exit the space. You also have advantage on Strength checks to not be grappled.

You are composed of a large amount of liquid and as such, you fare poorly in the burning environments. You have disadvantage on saving throws against Extreme Heat.

For slimefolk, water is both an essential part of life and a death sentence. If you start your turn in a body of water, such as a lake, an ocean, you take 1d4 necrotic damage at the start of each of your turns. Rain is similarly harmful, but only inflicts 1 necrotic damage per turn. If this damage reduces you to less than half of your maximum hit points, you are considered to be poisoned until your hit points are restored to over half your hit point maximum. Finally, if you are reduced to 0 hit points by this trait you fall unconscious and are unstable.

Your creature type is both humanoid and ooze. You don't require sleep and by moving across surfaces you can break down otherwise inedible substances to garner nutritional value.

Slimefolk are known for the various forms that they can take, appears to be tall and lean one day, and then the next, being short and curvy. Their skin could be slimy and sticky one day, then be bouncy and gelatin-like the next. At the end of a long rest, you can change simple miscellaneous details about yourself such as your "hair"'s length or shape, or make yourself a bit taller, smaller, wider or thinner.

You can speak, read, and write Common and Ooze, a dialect of Primordial. Ooze to those that speak Primordial sounds like a butchered version of Terran and Aquan. To everyone else, it is a bubbling, slushing language that sounds more like boiling mud then it does a language.