Zarc eventually became Duel Champion, and he asked his audience if they wanted more. When they replied that they did, he Summoned his [[Four Dimension Dragons|four dragons]] to destroy everything in his path. Feeling that his dragons were also not yet satisfied with their battles and seeking to attain the strongest power, Zarc [[Astrograph Sorcerer (anime)|fused]] himself with his four dragons, becoming a single dragon singe Duel Monster that people called feared as the terrifying '''Supreme King Z-ARC'''. After Zarc's declaration of destruction, the armed military was unable to stop his continuous attacks on the world, and eventually he was only able to be opposed by other Duelists who collaborated with the military to stop him, but none were able to come close to matching his newly fused powers and were wiped away along with the opposing military forces.<ref name="ep126" />

During [[Yuya Sakaki]]'s Duel against [[the Sledgehammer]], Zarc's will reacted to [[Yuya's pendant]] and transformed several of his monsters into the first [[Pendulum Monster]]s.<ref name="ep1">{{episode|Yu-Gi-Oh! ARC-V|1|ref}}</ref>

Yuya was brought together with two of his counterparts, [[Yuto]] and [[Yugo]], who proceeded to Duel each other. Zarc influenced both Duelists, causing Yuto and Yugo to enter an [[awakened]] state.<ref name="ep37">{{episode|Yu-Gi-Oh! ARC-V|37|ref}}</ref> Both Duelists eventually [[Synchronize (ability)|synchronized]], voicing a desire to destroy everything, but Yuya, who was unaffected at the time, managed to calm Yuto down. As a result, the still-awakened Yugo ultimately defeated Yuto, but when [[Zuzu Boyle]] arrived, her [[Zuzu's bracelet|her bracelet]] caused Yugo to vanish and Yuto was absorbed into Yuya, also passing "[[Dark Rebellion Xyz Dragon (anime)|Dark Rebellion Xyz Dragon]]" to him.<ref name="ep37" />

During their Duel, Yuri and Yuya Summoned all Four Dimension Dragons, which caused Yuto to fall under Zarc's influence and Zarc's dark aura to overflow around them. Yuri reviled in it, while Yuya barely held it back.<ref name="ep134">{{episode|Yu-Gi-Oh! ARC-V|134|ref}}</ref> Yuri, Yuto, and Yugo urged Yuya to become one with them as Yuya continued to struggle, though he appeared to regain control when Declan urged Yuya to simply concentrate on winning – just as Zarc's audience had in the past. While Yuya won the Duel, he finally succumbed to Zarc's will and released a surge of darkness as he absorbed Yuri and used summoned "[[Astrograph Sorcerer (anime)|Astrograph Sorcerer]]" from his "[[Stargazer Magician]]" and "[[Timegazer Magician]]" cards to fuse with the Four Dimension Dragons and become Supreme King Z-ARConce more.<ref name="ep135">{{episode|Yu-Gi-Oh! ARC-V|135|ref}}</ref>