Poplium

The poplium is thought to be a deceased spirit, but its exact origin is unknown. It floats about, pulsating like some kind of organ. These spirits have been known to slip into humans through their mouths and then control them like puppets. The poplium seems to enjoy seeing its hosts' friends and families baffled by the hosts' sudden change in personalities. If someone close to you begins acting in an incomprehensible manner, it is quite likely that they have fallen victim to a poplium. Bathe them in holy power and the monster should come flying out of their mouth in all haste.