Hand of Zanatus
Hand of Zanatus is an unique trait in Symphony of War for Zelos. His squad will deal double morale damage and the enemy will not surrender. The morale damage will decrease damage output of the enemy squad and decreases the odds of them acting a third time in battle.
It will also disable Force Surrender of his squad, thus if used for lowering morale, another squad needs to act after in order to capture enemy soldiers.
Strategies
Hand of Zanatus allows Zelos to deal significant morale damage to enemy squads for other squads to use , but it means that his squad cannot capture enemies at all. This includes if Zelos' squad is equipped with the Skull of Rowdain artifact, in this case, the enemy will retreat and not surrender and you do not get the benefits of the surrendered units at the end of the chapter.