xia yu's powers remain sealed until his paternal grandfather's plan to take over the world backfires causing a beam of dark energy to strike directly at him, turning him into "gui feng" (鬼鳳 / "ghostly phoenix"), who is the "original power-user of fire" (火的原位異能行者). gui feng is so powerful that not even a "feng long tie" (封龍貼) can suppress him completely. but since his element is needed to help xia tian become "zhong ji tie ke ren" (終極鐵克人), they cannot strip his powers away. his family eventually finds a way to contain gui feng by using "bing gu zhou" (冰箍咒) to cool his fire, which gives xia yu the time that he needs to learn how to control gui feng.