Lamia

Lamia is a monster that lives mostly in the deserts. It is also the name of a weapon named after the creature, a spiky whip, forbidden in most countries.

In the PnP RPG
According to the Wiedźmin: Gra Wyobraźni RPG, Lamia is a creature thought by some to be related to vampires. Lamias are resistant to iron. Lamias are snakes with heads and bodies of beautiful women that can polymorph to a full-bodied woman to lure their victims into traps.