You stand over a corpse and begin to drain all of its remaining life force from it. In this act the caster takes away the true life of this individual. Casting this spell gives you all of the individual's memories and a single skill or tool proficiency (DM discretion). This also renders the body unable to be resurrected completely. A corpse that has been dead for no longer than 70 days is able to give everything. Longer than that is up to DM discretion.