Baltasar's Impediment
(Abjuration, Necromancy)(Necromancy, Protection)

Range:  0
Components:  V, S, M
Duration:  Special
Casting Time:  1 round
Area of Effect:  Female mammal touched
Saving Throw:  None

This spell enables the caster to prevent a female from becoming pregnant. Essentially, it impedes a fertilized ovum from implanting in the uterus. The casting of Baltasar's impediment is not necessarily an evil act, but the DM should pay particular attention to the alignment of the caster as well as the social and political (especially religious) atmosphere. For example, a lawful good priest casting this spell on a teenager without the permission of her parents, church, etc. should be prepared for the wrath of his deity. A priest who worships a fertility god cannot cast this spell.
A neutral evil priest, nephew of the king, might repeatedly cast this spell on the queen in a secret attempt to usurp the thrown. A neutral good priest might cast this spell on all the maidens of the keep before its fall to the orc siege - although he cannot spare them from the horrors to come, at least he can prevent the bastardization that might result.
The material components are a drop of blood from the target's last menstrual period (or an ounce of her blood, from anywhere, that has been mixed with dust and dried in a silver chalice) and the priest's holy symbol. The priest invokes the name of his deity, touching his holy symbol to the blood. The woman must then consume it, usually mixing it with wine or some other fluid. The spell remains in effect until the first day of the woman's next menstrual period, or until a successful dispel magic is cast upon her.

