black gold. Ultraman card is a product of Zhejiang Kayou Culture Communication Co., Ltd. registered in Yiwu, Zhejiang Province. By inquiring about the company's product introduction, it shows that black diamond silver is an ordinary card and black gold card is a limited card, so black gold is good. Zhejiang Kayou Culture Communication Co., Ltd. was established on February 27, 218 and registered in Yingcai Pioneer Park, Choujiang Street, Yiwu City, Zhejiang Province.