Devour

This spell consumes the soul of a living being- if they even possess one. If a being does not possess a soul, this spell fails and also wastes a spell slot. 

Call forth a sudden hole of extreme negative energy within yourself, acting like a vacuum to the weakened living- filling the hole within yourself of the living's remaining power, to feel the hunger of the undead and sate it in a quick, invigorating motion of the hand, tearing at a targets soul to violently separate it and consume it with your own, taking either large hunks or the entire soul in a singular swipe. 

the target MUST:
Have a soul 
Be under an eighth  of it's maximum HP
be within melee distance of your bare hands

for each slot used above this spell, target one additional target per cast. targets must meet criteria, or the bonus is wasted. extra targets must be within totaled moving distance. (moving from one to another in a single turn). This spell does not work on undead or constructs.