Naga-Kin

Naga-Kin are a race of half-snake and half-humanoid people who are secluded from civilizations. They are commonly mistaken as Yuanti, but Naga-Kin were created when an old civilization made a deal with the devils of hell, what they didn't realize is that their deal cursed them and their offspring. After which the civilization fell to ruin for a variety of reasons, lost to time.   Because of your snake lower-half you are considered a large creature, typically Naga-kin tails range from 10ft-25ft and height vary from sub races, In combat you occupy a 10ft x 10ft square (two squares or three hexagons). You can fit into places where medium sized creatures can fit. The Naga-Kin have 3 subraces. You must choose one.
Serpentine Body. Your snake like body gives you uncanny movement, Traversing through rough terrain does not cost you extra movement speed. Additionally, when prone, standing up does not require any movement. When attempting to escape or avoid a grapple, you have advantage on the roll.
Python Subrace
Viper Subrace
Anaconda Subrace

Languages. You can read, write, and understand Common and Draconic.