Imbue Purpose

This spell allows the priest to give a weapon the purpose to slay a particular type of creature (ghouls, bears, elves, and so on) for a period of 24 hours. If the priest is good, the creature type must be evil. The weapon is treated as a +3 weapon for attack and damage. A magical weapon with greater bonuses uses those instead. A priest cannot imbue purpose to more than one weapon at a time.

Any subject creature hit by the weapon must make a saving throw vs. death or be slain instantly.

If a creature with 8 or more Hit Dice is slain by the weapon, the spell ends immediately. Any creature subject to the slaying effect that is hit by the weapon and survives must make an immediate saving throw vs. spell or flee as if affected by a fear spell.

The material component is powdered diamond dust worth 1,000 gp.