The Yu-Gi-Oh! Duel Monsters National Tournament prize cards are a set of cards that were given away to winners of the Yu-Gi-Oh! Duel Monsters National Tournament tournament (遊戯王デュエルモンスターズ 全国大会), a national tournament which was held from February 1 to 21, 1999 in Japan.
These cards made of steel, with the front and rear images of a usual card being printed on a card-sized steel plate. There is only one copy of each card in existence, although Replicas are known to exist. They are all Ritual Monsters printed as Normal Monsters, which have never been printed in this form otherwise; the next time they were printed, in Premium Pack 2, they had been changed to Ritual Monsters.