The yuan-ti are a race of serpent-like humanoids native to mainland Ibaya and the tropical islands off of its coast. Unlike other beastfolk, the yuan-ti are capable of shifting into an almost entirely human form to blend in while in foreign lands — a process which they call "shedding skins." If no further magic is used, only the shape of their pupils and some fine scales give away their true form.
Most yuan-ti worship the serpent goddess Sanezha and have accepted her mores as their own.