Homebrew Fractal Species Details

A Fractal, akin to a Fractine, is a humanoid Abberation  that exists purely on flat surfaces, being able to manipulate their appearance at will.
Having absorbed too much magic from a high-level divination or scrying spell cast by a powerful wizard. The massive overload of magical energy destabilized the Fractine's structure, trapping them in a semi-permanent humanoid shape and binding them to the Material Plane as a Fractal. Now, usually they wander the world trying to find enough ambient magic to either fully understand their new form or find a way back to the Astral Sea.

On the other side, it could just be an intelligent Fractine observing the Material Plane as a Fractal, out of curiosity.

Depending on the strength of the Fractal, it may have the ability to manipulate surfaces like loose bricks, soil, or stones as if it were throwing them in the 3D space.

Fractals, while they can't enter the 3D space or interact with it (being permanently 2D), can move across any connected surface, and take on the properties of that surface, or if it's intelligent, it could blend into skin by disguising itself as a tattoo, or marking.

Fractal Traits

2D, Fractine, Astral Sea

Surface Bound (2D)

You exist purely on flat surfaces (walls, floors, ceilings). You can move along vertical and overhead surfaces as if they were difficult terrain. While on a vertical surface, your hands are completely free. If you are forced into empty space (e.g., falling into a pit with no walls), you take falling damage normally as your 2D form bends violently in three dimensions.

Dimensional Slip

You can squeeze through spaces as narrow as a fraction of an inch without squeezing, provided there is a continuous surface to slide along.

Refracted Disguise

As an action, you can manipulate your flat appearance to look like any humanoid, a geometric pattern, or blend into the surface textures behind you. This functions like the Disguise Self spell but is a physical alteration of your surface form rather than an illusion. You can use this trait a number of times equal to your proficiency bonus, and regain all expended uses when you finish a long rest.