Before the duel continues, Dartz shows them what happened in ancient Atlantis. He explains how the Orichalcos appeared and corrupted the hearts of the humans and turned people into monsters, including his own wife, Iona. Dartz was shown the truth, however, when he encountered an Orichalcos stone and it explained everything to him and gave him the power of the Great Leviathan. His father, Ironheart, and daughter, Chris, tried to stop him by gaining the help of the monsters from the Dominion of the Beasts, but neither side was victorious. Dartz wants to finish the battle he began 10,000 years ago, and explains that due to his Orichalcos Kyutora's ability, his Life Points are safe from Yami Yugi and Kaiba's last attack. He then plays Orichalcos Deuteros, the second level of the Seal. As the duel progresses, things look dim for Yami Yugi and Kaiba, especially when Dartz plays his Mirror Knight Calling card which summons four Mirror Knights to the field. Kaiba destroys Mirror Knight Calling
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