When Zaos's mana was full again, he couldn't help but wonder… what was happening to him. He was killing people, people were killed by the droves around him, and he wasn't feeling anything anymore. He knew that humans are creatures that grow used to most types of things after they experience it over and over again, but he couldn't help but feel bothered by that… getting used to war.
Zaos shook his rage and then began concentrating when he saw his allies being pushed back by some riders. It hadn't been him who brought the fight to the enemies. It was the other way around. He may be fighting without considering how much all that killing was chasing him, but he was fighting for the right reasons, not because he liked it.