A Duel in Ruins: Part 1.Frustrated by his loss against Yuma, Vector dives into the center of his planet, into the Sea of Ill Intent, in order to free the Barian God, Don Thousand. Then, Vector offers his life to Don Thousand, and uses his power to resurrect him. Don Thousand grants Vector his power in exchange for locating the seven Mythyrian Number cards that sealed him away long ago. To achieve his plans, Don Thousand merges with Vector, and briefly possesses him, while restoring his injured body. Vector uses Don Thousand's powers to revive Mr. Heartland as a fly, who had fallen into Barian World since the events of the previous series, and he manages to locate some of the Mythyrian Numbers with assistance from Mr. Heartland. Then, Vector uses his new powers to accelerate the healing of Alito and Girag. Meanwhile, Astral brings Yuma, Tori, Shark and Rio aboard the spaceship, informing them of the Numbers scattered across the world. He also shows Yuma a message from Kazuma, saying they will need to obtain the Mythyrian Numbers before the Barians can. As they head to their first location, they end up crashing into Dumon and breaking his Baria Lapis, who ends up in a jungle, injured and stuck in his human form. Yuma doesn't recognize him, and wants to help him out despite Shark's warning to not trust others so easily. They soon come across a temple. After inadvertently activating a trap, Shark and Dumon, who decides to use the alias Nash (the name of one of the 2 missing Barian Emperors), become separated from Yuma and the others, forced to go down separate paths. Yuma's group ends up in the Mythyrian Number's chamber, where it is protected by its guardian, Mach, who challenges Yuma to see if he is worthy. Making matters worse, the walls in the room Shark and Dumon are trapped in start closing in, requiring Yuma to win quickly in order to save them.