Lumiel's pain fueled his skill's effects. Making him go berserk as a result. The Duplicate felt worried as he saw Lumiel succumb in great anger.
He was kind-hearted but when he uses such skills as the Chaos Knight. Some of his attitude changes. One example was when he transformed into a werewolf in the past, his character changed to be rough and wild.
Making him lose control was what triggers such scenarios. He has low control as a part of being a beginner job class. Something that was sacrificed in exchange for power.
But if he has higher control, he will be level minded and sober while using such skills. Making it a double-edged sword that will harm enemies and allies alike.
He started to grow scales on his right arm and was brimming with an aura that was harmful to enemies. Even the duplicate will be harmed too if he will approach him.