Alexander the Great recognizes Shadi as the one who set up the pyramid and its tests. When Joey protests that they did all the work and therefore deserve the power promised, Alexander reveals that he also cleared the five trials with four of his loyal vassals at his side—but the doorway wouldn't open. Feeling robbed of his prize, he lambasted his servants and was driven mad by the Millennium Ring. The Ring deserted him, but not before taking his vassals' lives, as well as his own, trapping their souls within the pyramid. Alexander's good half was locked in the game, while his evil half waited for a chance to escape. Two millennia later, he possessed Alex Brisbane and tricked Yugi's group, setting the events of the series in motion.
Shadi declares that since Yugi and Alexander both have claims to the reward, they must do battle in one final test—an all-out war. (Apparently what stopped him from entering the first time was the lack of an opponent.) Each side may summon every Capsule Monster they collected on their journey, and the first to run out loses. Joey notes that Alexander appears to be alone, but his vassals stand at his side, making the battle five on five.
Each side summons all of their monsters, except Yami Yugi, who keeps Kuriboh and Hinotama Soul locked in their capsules for now. Yami merges with Black Luster Soldier, while Alexander, who also possesses Duel Armor, merges with Reshef the Dark Being. His vassals flank Yami Yugi, so Joey, Tea, Tristan, and Solomon help out by damaging some of the enemy monsters. Displeased at his servants failing him, Alexander banishes them from the game and sacrifices seven of their monsters in order to summon the Seven-Armed Fiend, a hulking behemoth with seven different abilities.
The Fiend is huge and virtually indestructible, thanks to a defensive arm, the ability to summon Skull Knights and regenerate their forces, the ability to trap foes, and an arm that can read multiple minds at once, predicting and countering every strategy his opponents try. The Skull Knights destroy Flame Swordsman, and when Alexander unleashes the Arm of Destruction on Solomon Muto, Baby Dragon, Happy Lover, and Thunder Kid take the hit and are destroyed. Yugi and Yami Yugi realize they have to stop the Fiend somehow, but can't think of a way—until Yugi suggests that since the Millennium Puzzle is connected to Yami's mind, they can use that to trap Alexander within it.
The strategy works, and with Celtic Guardian and Magician of Black Chaos to aid him, Yami Yugi succeeds in taking the fiend down. Alexander's vassals and their remaining monsters come back to the playing field, and Yami admonishes Alexander for hiding behind Reshef's defenses—if he wants that reward, he'll have to fight him face to face...
This episode contains examples of:
- Bowdlerize: Succubus Knight is referred to as Demoness Knight, though her outfit is the uncensored OCG version.
- Combat Clairvoyance: Seven-Armed Fiend has this ability — and because its mind is linked to Alexander's, he does as well.
- Greater-Scope Villain: Yami Bakura, who inhabited the Millennium Ring, corrupted Alexander's soul and led him on the path to darkness. He's not mentioned by name at all, but the Ring and its effects tie into the backstory as well as present day events.
- Multi-Armed and Dangerous: The aptly-named Seven-Armed Fiend, especially since each arm has its own special power.
- No Name Given: None of Alexander's vassals are named.
- Taking the Bullet: Baby Dragon, Thunder Kid and Happy Lover fatally shield Solomon from Seven-Armed Fiend.
- Too Spicy for Yog-Sothoth: Since Alexander’s Combat Clairvoyance relies on reading the opponent’s mind, Yugi and the Pharaoh are able to trap him in the labyrinthine corridors of the Pharaoh’s Soul Room in the Millennium Puzzle to leave Seven-Armed Fiend wide open.
