It’s time for the endgame! After discovering the location of Dartz’s secret base in the middle of the ocean, our heroes are on their way to stop Dartz once and for all –with the entire navy as their escort! However, Dartz’s island is magically guarded with thundering maelstroms and tornadoes that prevent anyone from approaching! Can they reach Dartz before he resurrects the lethal Grand Dragon Leviathan from its millennial slumber?

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!