"After Synchro came Xyz—one thing after another, isn't it?"
Kaiba chuckled.
"But worlds divided according to Summoning Methods... Heh, no matter which world it is, everything revolves around dueling. Those with absolute strength can rise to the position of king anywhere."
Kira raised an eyebrow and looked at Kaiba in surprise.
Wait, why did the President know that worlds were divided according to Summoning Methods?
As a transmigrator, he naturally knew that this deduction was most likely correct.
The Fusion Dimension, Synchro Dimension, and Xyz Dimension were each defined by their respective Summoning Methods. Those unique Summoning Methods also reflected certain corresponding laws of those dimensions.
Just like how "the world came from a card" was a distinctive feature of the Yu-Gi-Oh! world.
But for someone who had only ever lived in one dimension, it should have been difficult to notice that, especially for someone who had barely come into contact with other dimensions.
Since the President could say something like that, it likely meant one thing.
Seto Kaiba might have come into contact with other dimensions long ago.
That was not an impossible guess. Seto Kaiba was the first person in this world to begin researching cross-dimensional technology, and he had already achieved a degree of success years ago. If it was him, it was entirely possible that he had learned of—or even come into contact with—other dimensions without the outside world knowing.
Perhaps that was why he had noticed that the distinctions between dimensions were related to the Summoning Methods prevalent in them.
"That device you brought back earlier, the one called the 'Perpetual Motion Machine,' was truly crucial," Mokuba said. "Our experts all believe it could be something that rewrites human history. After gathering the intellect of top experts from around the world to study it, we're