Ep. 26: A Duel in Ruins, Part 1

26

Vector revives Don Thousand and under his orders, he along with Durbe and Mizael go on to collect the 7 Mythyrian Number cards. On the other hand, Yuma and Astral are aware of the existence of one of those Numbers within a temple. However, upon finding such a card, they are challenged by a Number Guardian called Mach. (Source: Yu-Gi-Oh! Wiki)