Zi Yu is a very strong warrior. He is the younger brother of Zi Shou and a master swordsman. He is also one of the strongest characters in the series. His main fighting ability is known as Smelting Aura. His swords exist within the void. And he can summon many of them. He can also use various strong attacks thanks to Smelting Aura. His heavy blade which known as Heaven Punisher, it can attack with powerful flame based powers and it can easily incinerate the transcendent vigor and can purify the evil as well.