Soul

The Soul is a big connected piece of Essence that is found in sentient beings. It is thinly spread over the whole body but highly concentrated in the brain and heart. In the brain, it directly influences a beings mood and decisions and a being without a soul is oftentimes apathetic and has a weak will. That is if a being survives getting their soul took which usually results in instant death since you have to shred a person's Aura to get to their soul without destroying it and then rip away a vital part of them.