With Tristan, Téa and Mokuba out cold, Yami Yugi can no longer rely on his friends for moral support. Dartz tries to convince him to give up, saying that he would do more good to his friends by sacrificing his soul. Remembering that his friends will always be with him, Yami Yugi decides not to forfeit the duel, and instead activates Legend of Heart to unlock the Legendary Dragons' true forms: the three Legendary Knights of Atlantis. The three knights are able to destroy Dartz's Orichalcos Shunoros and Orichalcos Tritos, however Dartz discards all the cards in his hand and pays all his Life Points to summon the Divine Serpent, a creature with an infinite number of attack points. In order for the Pharaoh to win, he has to destroy Dartz's Divine Serpent. However, an attack from Divine Serpent promptly reduces Yami Yugi's Life Points to zero as well. By using the trap Relay Soul, Yami remains in the game, using Dark Magician Girl to prevent him from losing. But if Dark Magician Girl is destroyed, the Pharaoh will lose the duel. Dartz orders his Divine Serpent to attack Dark Magician Girl...