Mythyrian "Numbers", known as Legendary "Numbers" (伝（でん）説（せつ）のＮｏ．（ナンバーズ）, Densetsu no Nanbāzu) in the Japanese version, are "Number" cards which are located in Number ruins across the world, protected by guardians. They play a major part of the Mythyrian Numbers War and Barian Emperor Onslaught arcs of Yu-Gi-Oh! ZEXAL. Each one of these cards is connected to a figure from history, as the canon portrays it.