you don't know what or how that happened. You and Yin got ambushed by demons and when the demon attempted to attack you.. Yin slaughtered them all in a second but you know that wasn't Yin.. no it can't be him. He looked different, he sounded different then you realized it was Lieh. He killed those demons with no mercy or remorse. You could only stand there and watch him as he laughed like a maniac.