Osiris no Tenkuuryuu, known as 'Slifer the Sky Dragon' in the English version, is one of the three legendary Egyptian God Cards in the Yu-Gi-Oh! anime series. As a powerful Divine-Beast, Osiris plays a crucial role during the Battle City arc, where its immense power is sought after by duelists. The card is eventually obtained by the protagonist, Yugi Muto, and becomes a symbol of his strength and connection to ancient Egypt. Osiris embodies overwhelming might and is central to several key duels.