Yu-Gi-Oh! ARC-V Episode 21 English Dubbed Episode Title:Beyond Belief.Episode Description:As Declan continues to work on his own Pendulum Summoning in preparation for the tournament, Yuya tries to figure out how to bring Pendulum Summoning to its next evolution. Meanwhile, Julia approaches Zuzu and Sora about the masked duelist that has come across the incident where the LID students disappeared. Julia prepares to duel against Zuzu but Shay suddenly confronts Julia and attempts to duel her. However, the other masked duelist, Yuto, shows up and knocks out Shay, who believed Zuzu to be a girl named Lulu, before warning Zuzu not to use Fusion Summoning. Zuzu's bracelet glows again and Yuto disappears once more just as Yuya arrives with Kit and Dipper. As the group disperses, Yuya comes across the Polymerization that Zuzu had accidentally dropped.