since he made little effort in controlling his powerful but unstable abilities, a "feng long tie" (封龍貼) was placed on his neck making him no different from a "ma gua" (麻瓜 / "muggle"). xiu believes xia tian has the potential to become a "zhong ji tie ke ren" (終極鐵克人/ "ultimate iron man"), a savior of worlds, so he taught xia tian to play guitar and control gui long (鬼龍 / "ghostly dragon") - his evil half with greater power, who on several occasions, attempts to destroy xia tian in order to become the dominant personality. but although they are enemies, they have once come together to fight against zack, their evil counterpart from the bronze dimension. despite xia tian’s inability to control gui long, his mother made him the guardian of the xia family heirloom, the "feng long ka" (封龍卡 / "seal dragon card"), a mini disk containing everything about "power-users" (異能行者). in order for xia tian to become zhong ji tie ke ren, he must find the five original power-users of "wind, fire, thunder, lightning" and "rain" (原位異能行者) and collect their elements. in the end, he succeeds in collecting the five elemental powers and becomes the legendary zhong ji tie ke ren.