Ryou Bakura would probably never have entered the picture, were it not for and odd
compulsion that drives him to seek out Millennium Items. He's drawn to them Duelist Kingdom from the combined influence
of Pegasus' Millennium Eye and Yugi's Millennium Puzzle.
The odd compulsion comes from the Millennium Item he himself carries: the Millennium Ring. In its inert state, it has the
power to track the directions of other Millennium Items. But it also holds a darker power: the ability to trap souls in
inanimate objects. Once long ago, a grave robber, attempting to obtain the Millennium Items, ended up with his soul
trapped in the Millennium Ring itself. This shadow soul, Yami Bakura, emerges from the Ring whenever it is activated.
Yami Bakura takes over Ryou Bakura's body and continues his quest (even now) of getting the eight Millennium Items.
His quest takes him to Yugi and company, and he almost succeeds in sealing everyone's souls in their own cards, but the
Millennium Puzzle fights back, drawing Yami Yugi out so he can for their freedom. Blocked as he was because the
Millennium Puzzle gave Yugi a second soul, Yami Bakura thinks of other ways to get ahead, including trying to switch his
host from Ryou Bakura to Mokuba, but Tristan manages to outwit Yami Bakura and set him back. Tristan thinks he threw the
Millennium Ring away, but the Ring can be drawn back to its host at will. Learning of Pegasus' defeat, Bakura quickly
switches gears to confront Pegasus, overpowers him, and steals his Millennium Eye.
It is practically certain that the two shadow souls of Yami Bakura and Yami Yugi will cross again, since Yami Bakura still
wants Yugi's Millennium Puzzle.
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