Homebrew Protean Species Details

Beings of pure chaos, the serpentine proteans slither through the anarchic improbabilities of Limbo, remaking reality according to their whims. According to their own history, they were already here when the first gods pulled forth the other planes from raw chaos—and they have been battling against the indignity ever since. Hereditary and ideological enemies of Axis, Heaven, and Hell, and especially of the residents of those planes, all proteans see it as their sacred duty to return the bland, static expanses of mundane reality to the beautiful incongruities of Limbo, for the planes’ own good and for the greater glory of their mysterious god, a dualistic deity which may be a living aspect of Limbo itself. They are Limbo’s living, breathing immune system, rooting out infections of mundanity and replacing them with beautiful entropy. Primeval in shape and philosophy, proteans are the race that most perfectly embodies the twin aspects of creation and destruction (although certain aeons might contest this claim). Even their language is mutable, evolving so quickly that few outsiders can understand it without magical aid. Ecological study is nearly impossible, as reproduction can take a wide variety of forms, from sexual union to fission to spontaneous generation. Despite their deceptively similar natural appearances, the two things that truly unify the protean race are slavish devotion to their strange god and a fervent desire for the dissolution of reality as we know it.

Protean Traits

Proteans have the following traits:

Grabbing Tail

In your true form, your tail can be used to grapple large or smaller creatures. You do not need to have either hand free to grapple with your tail. Your tail can't be used to wield weapons.

Shape Change

As a bonus action you can assume the size and appearance of any humanoid or animal that is tiny to large size.
Your ability scores change as follows:

Size:           Ability Score Change:                                              Natural Weapons(If animal)

Tiny            -2 Strength and Constitution, +2 Dexterity                                   1d4
Small         -1 Strength and Constitution, +1 Dexterity                                   1d6
Medium                   None                                                                                    1d8
Large         +1 Strength and Constitution, -1 Dexterity                                   1d10

If you are in an antimagic field or your magic is otherwise suppressed you cannot access this trait. In animal forms you can still speak languages that you know.

Ability Score Increase

Your Strength,Constitution, and Charisma scores increase by 1

Age

Proteans typically live longer than humans, which can be a century to 2000 years, varying with no real pattern.

Alignment

Proteans are typically chaotic neutral

Size

Proteans are typically about 12-15 feet long. Your size is large, but in humanoid form with your shapechange ability, you count as medium.

Speed

Your base walking speed is 30 feet, you can fly at a speed of 30 feet.

Damage Resistance

You have immunity to acid damage and resistance to thunder and lightning damage.

Languages

You can speak, read, and write Common and Primordial.