Xyz Dimension Arc

Xyz Dimension Arc is the third story arc of Yu-Gi-Oh! ARC-V anime series. It follows Yūya, Shun, Gongenzaka, and Shingo's battle in Heartland City of Xyz Dimension against the Academia squad lead by its Commander-in-Chief, Edo Phoenix. The arc starts from episode 100 to episode 112. The opening theme used in this arc is LIGHT OF HOPE by Unknown Number!!!, while the ending theme is Vision by Kuso Iinkai.

Arrival
Stumbled in the destroyed Heartland, Yūya, Shingo, and Gongenzaka separated themselves with Shun who was looking for any member of Resistance left while the three of them look for Yuzu and tried to contact her through their Duel Disk, but there was no answer. They met some refugees who explained that they haven't seen any member of the Resistance recently and presumed that they all have been wiped out. Three Academia Duelists then found them and challenged the Lancers to a Duel.

Meeting the Resistance
The Academia Duelists were defeated and attempted to escape, but they were carded by a Resistance Duelist, Kaito Tenjō. Mistaking the Lancers as Duelists of Academia, Kaito challenged them to a Duel, which accepted by Shingo. Gongenzaka also joined the Duel in attempt to stop the two. Yūto, who was inside Yūya, started to communicate with Yūya and revealed Kaito's background as ace student from Heartland Duel School's Clover branch while Yūto, Shun, and Ruri were from Spade branch. He that Kaito's Dueling used to be subtle yet dynamic, which was a total opposite of the current Kaito who only filled with anger. Kaito defeated Shingo and Gongenzaka, so Yūya decided to connect with Kaito through Duel.

The strategy that Yūya used was correctly done, but Kaito was able to deduce his step and launched his own counterattacks, even destroying Yūya's strongest monster, "Odd-Eyes Rebellion Dragon". Yūto assisted Yūya by summoning "Dark Rebellion Xyz Dragon", a monster that Kaito recognized as Yūto's ace monster and thought for a moment that Yūya stole it until he saw a glimpse of Yūto within Yūya. The Duel was stopped by Shun's arrival with his two comrades, Allen Kozuki and Sayaka Sasayama. Despite Shun's assurance that Yūya and the others are his allies, Kaito refused to return to the Resistance and left.

At the Resistance's hideout, Allen and Sayaka revealed that while Shun and Yūto were gone, Academia had launched a large-scale attack that defeated the majority of their Duelists and civilians, forcing them of the victims, which became the reason why Kaito left the Resistance and act on his own. They also learned that Yūya's father, Yūshō, was a teacher of the Clover branch. However, Yūshō one day suddenly disappeared and Allen believed that Yūshō has abandoned them and ran away on his own.

Meanwhile, Yuzu ended up at Fusion Dimension and was chased by Academia Duelists after being mistaken as a runaway student. She was saved by Asuka Tenjōin who took her to an underground Duel School independent from Academia, You Show Duel School that turned out to be led by Yūshō. Yūshō explained to Yuzu that three years ago, he learned from Reiji that Leo intends to conquer the whole dimensions, so he forcefully made his way into Leo Corporation's lab to use the prototype of dimension travel device to got to Fusion Dimension and convince Leo. But instead of Fusion Dimension, he ended up at Xyz Dimension and stayed there until Academia invaded. He met the Commander-in-Chief of Academia stationed in Heartland, Edo Phoenix, and got sent into Fusion Dimension by him.

Back at the Xyz Dimension, Yūya went to look for his father, refusing to believe that Yūshō was running away like Allen believed him to be. While looking for his father, Yūya and Yūto discussed their current condition of sharing one body and the phenomenon that happened before during his Duel against Barrett. Both sensed there was something inside that overwhelmed them with great power and deduced that was most likely the cause of their current condition. They were interrupted when Edo, in disguise, questioned Yūya's presence on the site. Hearing that Yūya is Yūshō's son, Edo challenged him to a Duel, intending to capture Yūya and use him as a bait to lure out Yūshō. Yūya was having a