"Bai LiuXian had always hated the fact that he wasn't born with a spiritual core and was envious of me. When he came to know about how I became a half-demon, he decided to copy those despicable methods. He hunted down weak cultivators and killed them just to harvest their spiritual cores. One day he became a half-demon and that's when I learned the truth. At first, I couldn't believe it and kept telling myself over and over again that my brother wasn't a monster, but... I was wrong. By the time I realized it, he had already turned into a monster. By the time he became a half-demon, he was already used to the blood and killing. He had started to enjoy the hunt and didn't care about the reason anymore. Even after becoming a half-demon, he continued to kill people."
"If that's true then why didn't you just report him?"