He also discovered that he and Budong are biologically half - brothers .
At the later part of the story , he discovered that he is the son of the Prince of Darkness and Bugan which proved him to be the key in the completion of the Evil Trinity .
son also discovered that son and Budong are biologically half - brothers .
At the later part of the story , he discovered that he is the son of the Prince of Darkness and Bugan which proved him to be the key in the completion of the Evil Trinity .