Kaiba stops the match, disqualifying Zigfried for using an alias and revealing him as Zigfried von Schroder, Kaiba's former arch-rival and the tournament saboteur. The two then duel to determine whether Zigfried stays in the tournament. Kaiba summons his XYZ-Dragon Cannon, but Zigfried uses the Nibelung's Ring and his Three Goddesses to remove Kaiba's cards. (Source: Wikipedia)

Aired on: 3/2/2004