Yuan-ti Mind Whisperer! You wanted a snake person, right? That's what last tournament taught us? We're just getting every possible variation! Human sized, can turn into a snake, and have magic to hypnotize, charm, read minds, make illusions, and even clean the bedsheets in seconds. They're elusive, sneaky, manipulative, unpredictable, and notorious for making and breaking alliances with multiple competing factions. But hey. we can see that lack of junk down there. Which means it's likely the retractable kind you find on snakes. Y'all know where I'm going with this by now. Hemepenes, double cloaca extension, each hooked up to a separate teste so they don't have to rest while one's recovering!

can I pick ur beautiful mind for cool builds/backgrounds for maybe an aasimar or yuanti that isn't broken or cliche?

Yuan ti warlock (great old one) where the patron deity is an ancestor of theirs. Like "I got my powers from my great great grandpa. Sometimes he whispers to me"

Awakened mind can be like a Medusa's stare type thing. Entropic Ward could be little snake spirits popping up and meddling with attacks.

Eldritch blast could be flavored as like a snake head