Soul scour

Soul scour was a necromancy spell allowed the caster to corrupt the soul of another living being with physical contact.

Effects
Upon casting the spell, the caster's mere touch temporarily drained the essence of any living person or creature. After contact, the mental faculties and individualism from that person were drained from them over the course of a minute.

Casting
In addition to verbal and somatic components, this spell required the use of a pinch of dust comprised of the ground bones of a lich.