Phantasmal Putrefaction

You implant within the minds of your targets the illusion that their skin is rotting away, large rents are appearing all over their bodies, and their internal organs are spilling out into a putrid half-liquid mass at their feet. Those who fail to disbelieve phantasmal putrefaction immediately take 1d4 points of Wisdom damage. This damage occurs only once. Each round after that, an affected target receives another Will save to disbelieve the effect, and targets that fail must succeed at a Fortitude save or faint, falling asleep as per sleep (except that it isn't a magical sleep effect). 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.