Nagas and Lamias have various representations in mythology and fiction. One of them is that of a human upper-body (waist up) and the lower body of a snake. What I'm looking for would have a torso, human arms and a human head that could fool someone into thinking they're human until they see their lower body, a large snake body on which it slithers to move about (see visual examples below). In Pathfinder, the closest to this I could find is the Marilith, if not for the extra arms.
Some examples that don't work and why:
- Nagas in Pathfinder are mostly large snakes with a human-like head. They are missing a human torso with human arms to fit my goal.
- Serpentfolk, Yuan-ti or Nagaji are fully humanoid and walk on legs. They do not slither on their body/tail.
Is there a monster that fits the description more closely in Pathfinder?
I'm interested in a ready-made set of stats mostly. It may be a generic monster or specifically from the Golarion setting, I don't mind.
Visual examples of what I'm looking for: