Defiler Scent

Using this spell, a priest can discern whether a particular being is a defiler, although it doesn't tell him if the creature is a spellcaster.

A priest picks a creature in a radius of 10 yards for each level he has attained. He concentrates for one round and waits as the spiritual odors of the suspected defiler waft toward him. Preservers and creatures by race and species smell normally. Defilers carry the bitter scent of smoldering meat.