Shade
Monster Junkie
So...
Fiendish Transformation (Su): After X rounds (?), the spirit-ghoul may attempt to transform any creature that it possesses. The target must make a DC X Fortitude save or gain the spirit-ghoul victim template (see below). If the save succeeds, the victim is immune to the spirit ghoul's fiendish transformation for 24 hours, but the possession is not ended. If the save fails, the spirit-ghoul takes control of the victim (as a magic jar spell, except that it does not require a receptacle). Once the victim is transformed, only banishment, dispel evil, dismissal, holy word, or similar magic can end the possession and return the target to its previous state, as can a turning attempt that would destroy an undead of the spirit-ghoul victim's HD plus 2.
Fiendish Transformation (Su): After X rounds (?), the spirit-ghoul may attempt to transform any creature that it possesses. The target must make a DC X Fortitude save or gain the spirit-ghoul victim template (see below). If the save succeeds, the victim is immune to the spirit ghoul's fiendish transformation for 24 hours, but the possession is not ended. If the save fails, the spirit-ghoul takes control of the victim (as a magic jar spell, except that it does not require a receptacle). Once the victim is transformed, only banishment, dispel evil, dismissal, holy word, or similar magic can end the possession and return the target to its previous state, as can a turning attempt that would destroy an undead of the spirit-ghoul victim's HD plus 2.