Clearly recalling the way his Universe had been devoured, Nial could only grit his teeth.
He was desperate to do his best to get back everything he had lost. But even then, he felt incapable of destroying the Universe of others by killing their strongest Cultivators.
This was just too cruel, and it may even end up initiating an endless cycle of revenge, blood, and death.
It was already a gut-wrenching loss that made him feel as if everything was useless as if it was impossible to retrieve the Universe, and the people he loved more than his own life.
However, even if it was close to impossible, Nial knew that he would use every single means to protect the ones he loved.
Thus, when he saw the way Jason tried to protect his father, he knew that this God was just like him, giving his best for the people he loved, even if that meant putting his own life in danger, or even sacrificing himself.