Steel Tiger Mask lead a two-prong attack in association to attacking both a researcher father and his son in order to gain uranium-303 for the Black Cross. However while the initial attack was against the father, the main battle was in trying to get to his son in order to hold him as a hostage. During the initial Black Cross intrusion on the home, the scientist's son becomes hurt while Kaijo and Peggy take him to Varitank to save him and protect him until they can reunite. However once in Varitank, Steel Tiger Mask does everything in his power to prevent the reunion from occurring, from landmines to direct assaults, with assistance from Battler ships and Black Cross Castle to prevent Varidreen from getting too close for a close rescue. When the tank nearly runs out of fuel, Shinmei, Daita