* When Jonouchi's weird dreams first come into play in the Duelist Kingdom, he finds himself facing down the embodiment of the Millennium Eye as it [[spoiler: hunts down the last piece of Seto Kaiba's soul, which took the form of Kaiba's younger self.]] His solution to escaping the thing? ''Jump through it's eye.'' And it ''worked''.
** Yugi managed to top this by destroying it from inside Yami Yugi's head by simply ''telling it to leave''. Watching {{Eldritch Abomination}}s die has never been so sweet.
* And lets not forget Kaiba's own non-canonical moment during the Legendary Heroes arc, topped off with this line: 'I don't need ''cards'' to fight.' Realize that [[spoiler: her]] arm was literally in ''flames'' as Kaiba was saying this, and that the line was followed by [[spoiler: her]] cutting through a duel monster ''with that same arm''.
* Also from the Legendary Heroes arc, there's Mai, who took down ''three dragon heads in a few seconds'' during the final battle of the so-called game. That ''entire arc'' is filled with CMOA's when you look back.