Phantasmal Putrefaction

This creature believes that its skin is rotting away, large rents are appearing all over its body, and its internal organs are spilling out into a putrid half-liquid mass at its feet. Each round after that, it receives a Will save to disbelieve the effect, and if it fails it also must succeed at a Fortitude save or faint, falling asleep as per sleep. Waking up doesn't end the spell for a target; it must continue to attempt Will saves to disbelieve and Fortitude saves to avoid fainting each round until the spell ends or the target successfully disbelieves.