Last First Duel.Astral World and Barian World avoid the collision and begin to separate, and Kazuma parts ways with Vetrix. While Yuma is saddened by Nash's death, he is pleased to find that Flip, along with all the others who sent to Barian World, have returned safely as a result of Nash's and Don Thousand's defeat (with the exception of Kite). Then, the fusion between Barian World and the Human World is undone, allowing both worlds to finally separate. Yuma's happiness is short-lived, however, because Astral reveals that since he has gathered enough Numbers to obtain the Numeron Code, he intends to carry out his mission to destroy Barian World. Refusing to let him do such a thing, Yuma challenges Astral to a duel to decide who will possess the Numeron Code, with Astral stating that he will destroy Barian World and remove Yuma's memories of him should he win. Later that day, Yuma's friends come by to help him construct a deck to face against Astral's Numbers, but Yuma decides he wants to duel him with his own strength. Before the duel, Yuma informs Tori about the true stakes of the duel, asking her to keep quiet about it so as to not cause any worry. The duel soon begins, with Astral quickly assembling Utopia, Utopia Ray, Utopia Ray V, Utopia Ray Victory, and Utopia Beyond, and boosting his life points to 5,250. However, Astral attacks Yuma with each of his Utopia monsters, with Utopia Ray V eventually getting through and depleting Yuma's life points to 1,400.