Under every large city dwells the soul hunter. It lives in a large underground catacombs. His eternal mission is to gather human souls in order to sacrifice them to the fallen demon of chaos in hope to make him rise again.
Once a month in a night soul hunter leaves his cave and seeks for a stray man. Then he captures him and sucks his soul. The worst part is that he leaves a small part of a soul in the body so it still maintains alive but almost hollow.
Soul hunters were scavenging since the dawn of human race and so they learned to imitate their ways of life. They learned to craft armor and weapons and use them properly. In combination to their incredible strength and agility it makes them almost undefeatable even for a small army. That is why only the most brave and foolish warriors dare face them in a battle.