Duel Priest

A Duel Priest or Diak Um ( Diaku Umu) is a special man who takes part in a religious ritual against the Duel Priestess, the Ritual of the Sun and Moon, since ancient times.

Story
In the thirtieth century B.C., the Ritual of the Sun and Moon was conduced annually. At that time, the power of the Ultimate God was feared by people. After the Duel Priestess Ix Quic Goodwin's death in a ritual, Rex and Roman became Duel Priests and took part in the ritual; however, it failed.

In the twenty-first century, Roman chose Sect Ijuin as the next Duel Priest, who then took part in a Ritual against Akiza Izinski. During the Duels inside the Sky Fortress Seibal, Yusei Fudo also becomes a Duel Priest.