Invasion of Xyz Dimension

The invasion of the Xyz Dimension was an event in the Yu-Gi-Oh! ARC-V anime.

History
Reo Akaba, the Professor of the Academia, ordered his elite vanguard squad to advance into the Xyz Dimension and attack, as part of his plan to eventually unite the Four Dimensions. Without warning, they did so, sealing nearly all of the inhabitants of Heartland City in cards in the process, including Ruri Kurosaki. Yuto, Shun Kurosaki and a few others were the only survivors of the attack.

In the aftermath, Barrett was sent to the ruined Heartland City on a mission with a few of his own comrades, but they were attacked by a "Widespread Ruin" Trap Card. At some other point, a Synchro Dimension Duelist named Yugo appeared in Heartland, and was challenged by Yuto. Their dragons fought each other until Yuto's allies appeared, at which point Yugo retreated.

Seeking to avenge their comrades, Yuto and Shun traveled to the Standard Dimension and began attacking the members of Leo Duel School that used Fusion, sealing them into cards. Yuto attacked Shingo Sawatari before learning that most students of LDS were oblivious to the situation, while Shun attacked Marco and Tio.