The Millennium Puzzle (パズル Sennen Pazuru) is one of the Millennium Items. It was originally known as the Millennium Pendant ( Sennensui), but after being shattered and requiring assembly it came to be known as the Millennium Puzzle.
Ikran's F-Zero timeline
The Millennium Puzzle performed as a sacred relic housing Yami's spirit. It can also sense when evil is nearby, when Deathborn came into being after the GX Grand Prix. It can also help Yami strengthen his abilities, like communicating with the Dark Magician telepathically. And as long as the pieces are in unity, the pharaoh seems to draw its strength, even resisting against the Skull's and Black Shadow's umbrakinesis. Until the Eye of Wjat was hit by Deathborn, rendering him and the puzzle powerless, till the villain's demise. It was soon disassembled, twice, at the Millennium Chamber allowing Atem's spirit to rest.