This is Ophidiniere: the snake wine bartender mon: It produces a poison that ferments under its pot, though if not diluted enough the drinker transforms into a serpent themselves.
So basically its a horny shuckle.
This is one of a bunch of ideas I had that some how got to this state.
Uncensored
https://fetmon.booru.org/index.php?page=post&s=view&id=339