Editing The Great Leviathan (section)

== Biography ==
Dartz, the king of Atlantis, was corrupted and manipulated by the Orichalcos Stone, which commanded him to resurrect their god, the Great Leviathan, using the souls of humans. The Leviathan was ultimately defeated by the three Legendary Dragons—Critias, Hermos, and Timaeus—but the battle resulted in the sinking of Atlantis. Like [[Bakura Ryou|Zorc Necrophades]], the Leviathan embodied pure evil, driven by a desire to exterminate all life on Earth. To achieve its resurrection, Dartz needed the souls of three specific Duelists who wielded the Legendary Dragon cards: Yami Yugi, [[Seto Kaiba]], and [[Joey Wheeler]].

As Dartz collected more souls, the Leviathan grew increasingly active. Its presence became especially evident when the souls of Joey and Kaiba were captured. Following Joey's capture, the Leviathan began to manifest in the skies, and by the time Kaiba's soul was taken, it had become conscious enough to roar from its astral prison.

When Dartz failed to capture Yami Yugi's soul and lost the souls of Kaiba and Joey, he sacrificed his own soul to revive the Leviathan. Declaring his soul to be of "equal" value, Dartz succeeded in resurrecting the Leviathan. The monster overwhelmed the Legendary Knights and an army of Duel Monster spirits, but Yami Yugi was able to channel the light of the souls the Leviathan had absorbed. Using this power, he summoned the three Egyptian Gods—[[Slifer the Sky Dragon]], [[Obelisk the Tormentor|Obelisk the Tormentor,]] and [[The Winged Dragon of Ra]].

The Leviathan, now fully revived, roared its challenge and soared into the skies, pursued by the Egyptian Gods. A climactic battle unfolded over the ocean. While the Leviathan initially seemed evenly matched with the Egyptian Gods due to its immense power drawn from millions of captured souls, Yami Yugi tapped into the light within those same souls to empower the Gods. With their newfound strength, the Egyptian Gods overcame the Leviathan, neutralizing its dark power and vanquishing it.

In the aftermath, Yami Yugi freed Dartz from the Leviathan's corrupting influence by using his own light, symbolized by a memory vessel, to eradicate the hatred and resentment that had fueled the Leviathan. This act extinguished the curse of the Orichalcos and permanently destroyed the Leviathan. In the Japanese version, [[Dark Magician Girl]] mentioned that the Leviathan was sent to live peacefully in the Duel Monsters Spirit World after its curse was lifted. Atlantis, meanwhile, sank back to the ocean floor, restoring balance to the world.