Mai has activated the "Seal of Orichalcos" against Joey, having joined Doma in the search for power great enough to ensure that she could never be defeated.
The Duel is observed by Yami, Téa, Tristan, Valon and Rafael. Weevil and Rex also watch the Duel from behind the security gate. The later two have just arrived along with Duke Devlin, who goes to try to find another way in and disable security.
On The Very Edge
Joey's turns up until now have been half-hearted because he does not want to defeat her in such conditions. However, with only 200 Life Points left, he has realized that he must duel with all he has in order to reach her. With this, he takes his next turn, dealing the only damage Mai has taken so far.
Yami thinks that if Joey were to go for a Tie-In, maybe the Seal would break and none of them would lose their souls (exactly what happened in Kaiba's fight against Alister.)
She calmy responds by summoning Harpie's Pet Dragon, increasing its attack power to overwhelming levels. Valon looks on eagerly and sure of her victory, while Rafael admits he was expecting more out of Joey.
Joey responds by activating a gambling Trap. He has a one-in-three chance of Negating her Attack; if he misses, the Attack will go through unchecked. He succeeds, but his Trap's other effect gives Mai back two Cards that wrecked his forces in previous turns.
Joey switches to defensive playing, and although his Life Points stay safe, his attempts to use effects on her attack forces are each parried by her new cards.
Rather than risk attacking into a dangerous effect, Mai draws on her newfound power, using her retrieved Harpie Lady Phoenix Formation to go for the kill. Joey saw this coming, and his defensive effect stops her chance of a finishing move. However, he is nearly out of resources, and he has not decreased her power at all.
The 3rd Dragon
Backed into such a corner, he notices a bright light coming from his Deck. He is transported to another world, arriving at a crystal statue of a dragon with a sword stuck in it. He removes the sword, freeing "The Claw of Hermos" and bonding to it. In the real world again, he takes his Turn, Drawing and revealing Hermos, the newest power of his Deck.
Rafael's Orichalcos fragments shines and he realizes it must be the "Legendary Dragon", making Valon nervous.
Featured Duel: Mai Valentine vs. Joey Wheeler - Part 3
Turn 8: Joey
Joey has just conducted his Draw Phase. Joey's hand contains "Compensation Mediation", "Monster Reborn", "Time Wizard", "Drop Off", and "The Fiend Megacyber". Since Mai has at least two more Monsters than him in play, Joey Special Summons "The Fiend Megacyber" (2200/1200) in Attack Position. "The Fiend Megacyber" attacks & destroys one "Harpie Lady" (Mai 4000 → 3600). Joey Sets a Card.
Turn 11: Mai
Mai draws "Harpie Lady Sparrow Formation". Joey then activates his face-down "Drop Off" to make Mai discard the card she just drew, but Mai activates her face-down "Trap Jammer" to negate the effect of "Drop Off" and destroy it. Mai then sets a card. "Harpie's Pet Dragon" attacks & destroys Joey's "The Fiend Megacyber". "Harpie Lady" attacks & destroys Joey's face-down Monster. It's revealed to be "Fiber Jar" (500/500). Since "Fiber Jar" was flipped face-up, its Flip Effect activates, which would add all the cards in both players' Graveyards to their Decks and force both players draw five cards, but Mai activates her face-down "Harpie's Feather Storm" to negate the Flip Effect of "Fiber Jar" and end the Battle Phase.
Turn 12: Joey
Joey draws a Monster and subsequently sets it.
Turn 13: Mai
Mai draws "Harpie Lady Phoenix Formation" and subsequently activates it to destroy Joey's face-down monster and inflict its total ATK as damage to Joey. The set monster is revealed to be "Neko Mane King" (0/0). Since "Neko Mane King" was destroyed by a card effect, its effect activates, ending Mai's turn immediately.
Turn 14: Joey
Joey & Yami Yugi have a vision, and Joey unlocks the "Claw of Hermos". It is the card he draws during his Draw Phase.