Soul of the Supreme King.Declan reveals to Yuya that Riley became an infant due to the power of the four Natural Energy cards and absorbing Zarc's evil essence to keep him from splintering into the four dimensions again. Declan adds that Zarc is gradually taking over Riley's body, and it would only be a matter of time before he resumes his attack on the world. He explains that Yuya's skills as a Dueltainer might enable Riley to smile to stop Zarc for good. Yuya is perturbed by how he is supposed to carry out Declan's plan along with his impression that Ray and her incarnations may still be within Arc-V. Gong encourages Yuya by casting aside his Heavy Strong Style to attack Yuya with Action Cards. The duel turns into a race for Action Cards and repeated counterattacks, Yuya deals piercing damage, while Gong destroys Yuya's Odd-Eyes Pendulum Dragon. When both of their life points are low, Yuya manages to get an Action Card and defeats Gong. Declan takes Yuya to a functioning fragment of Arc-V and tells him that he must travel to the other dimensions and defeat the remaining Lancers to be approved for Senior class before saving Riley. Yuya travels to the Xyz Dimension, where he finds Dennis instead of Shay as his next opponent.