The card you're probably referring to is "Blue-Eyes Ultimate Dragon", Kaiba's signature monster. This powerful card appears numerous times throughout the series.
Here are a few of the most memorable instances:
* Against Joey Wheeler: In the Duelist Kingdom arc, Kaiba uses "Blue-Eyes Ultimate Dragon" to defeat Joey's "Red-Eyes Black Dragon".
* Against Yugi Muto: Kaiba's "Blue-Eyes Ultimate Dragon" is a recurring threat throughout many of his duels against Yugi, including the epic battle at the Battle City tournament.
* Against the Big Five: Kaiba uses his "Blue-Eyes Ultimate Dragon" to overcome the challenges posed by the Big Five in the "Duelist Kingdom" arc.
While there is no "Luster Dragon" card in the official *Yu-Gi-Oh!* game, it's understandable to get confused as "Blue-Eyes Ultimate Dragon" is a powerful and memorable card in the series.