Grand Dragon Leviathan’s thunderous roars unleash hundred-foot tall waves worldwide to destroy every town and city on Earth and wash away all traces of humanity! How can Yugi’s simple soul stop the annihilation of the planet from the greatest natural disaster in history? Billions of lives are at stake in the thrilling conclusion where failure means extinction!

It’s the brawl for it all! All the monsters of Earth join forces with the survivors of the monster domain for an epic showdown against Grand Dragon Leviathan with the fate of both worlds hanging in the balance! But the tide of battle is turning against our heroes as Grand Dragon Leviathan unfurls gruesome tentacles to snatch Yugi and his crew and absorb them into its body!

Dartz calls forth Divine Serpent Geh, a sinister snake with infinite attack points! Yugi counters by joining the three legendary dragon knights into the mighty Timaeus the Knight of Destiny, but is that enough to combat a monster with limitless strength? As the great forces clash, the gateway opens for the final endgame as the world-devourer Grand Dragon Leviathan and the legendary Atlantis rise out of its watery grave!

Someone once said that to be alone is to be indifferent to one's surroundings... Preposterous! When you're alone, because you're alone, you are more sensitive to your surroundings than anyone else. That is why Mile, with a long history of alone-ness, notices. She has noticed. And she wonders, "could it be that everyone's avoiding me?!" Mile fears the looming threat of being alone again. What are Reina and the others' true intentions?

Fujimaru and company ever so easily have Jaguar Warrior join their ranks, and are reunited with the soldiers of Uruk, thought to be all dead, outside Eridu. Learning of their safety, the group sees a way to defeat Quetzalcoatl. They finally arrive at Eridu's Temple of the Sun, and they challenge Quetzalcoatl, one of the deities of the Three Goddess Alliance, to a battle. While in a fierce battle in an attempt to destroy the Altar of the Sun, Fujimaru seeks assistance from Ishtar's powers and challenges Quetzalcoatl to a head-on battle of the soul.

On the night of his brother's wedding, Dale comes to terms with his position among the Teathrow, and the course of events that led him to meet Latina.

Enko Onikuma—one of Boruto's former classmates and a member of Team 40— was possessed by a Summoning Beast as a child. Now, she can manifest its enormous power. But lately, she hasn't been able to control her power, hindering her work on missions. Meanwhile, Ibiki Morino approaches Enko and tells her that she'll be working under him going forward.

On Gloom Island in the Grand Line, Perona finds out that her captain, Gecko Moria, is alive and she is about to leave Dracule Mihawk who let her stay there for the last two years. Meanwhile, Moria raids the Pirate Island of Fullalead with his zombie army to take back his friend from Blackbeard.

Iruma, Asmodeus, and Clara end up in the Misfit Class. As the name suggests, the class is filled with a bunch of misfits and Sabnock Sabro, who wants to become the next Demon King, declares Iruma his rival. Their classes start and their first lesson is a flying race. The race was to take place in the Warbling Valley and the Cutthroat Valley. Apparently, there’s also a demon bird that lives there...