I am an illusionist. By creating an illusion in the eyes of other creature, my kind is able to separate the soul from the body. It is... usually a horrific and irreversible process.

I should point out, however, that in being a peaceful illusionist, when I feed it causes no harm. The soul has many parts and one of these parts is replenishable. A simple meal or a night of rest will make a creature feel well again.