Millennium Puzzle
What is Millennium Puzzle?
Powers of Millennium Puzzle
In addition to holding the soul/spirit of Pharaoh Atem himself, the Puzzle is able to fulfil one single wish of the person who had solved it and heighten its owner's chance of success in a game, judging by their skill-level as well as the importance of the game at hand. The hieroglyphs inscribed on the puzzle say, "The one who solves me shall gain the powers and knowledge of darkness..."[5]Its main power grants the owner the powers and knowledge of darkness and shadows, giving him incredible skill at strategy and allowing him to use ancient and powerful magic. That magic is mainly used to start and control Shadow Games. The Millennium Puzzle is the most powerful of all the Millennium Items. When Yugi activates its magic, the Eye of Wdjat glows on his forehead. Its most well-known power is Yugi switching his body and mind with the spirit of the Pharaoh.
In the first series anime, Shadi entered Yugi's mind room belonging to Dark Yugi, looking for the secret powers of the Millennium Puzzle. Dark Yugi confronted him and challenged him to a game, where he was to find the true mind room amongst the countless mazes of doors that were riddled with traps. He failed, and was very nearly killed by a particular trap which caused the floor of the room to collapse. Dark Yugi saved him and Shadi left, defeated. A similar event happens in the second series anime during the Duelist Kingdom arc, but it is Yugi who rescues Shadi, not Yami Yugi. Yami Yugi also explains to Shadi that the Millennium Puzzle holds the power of unity, just as the many pieces of the Millennium Puzzle assembled and united.
It is able to initiate Shadow Games and corresponding Penalty Games that Dark Yugi used to punish those who harmed Yugi or his friends. In the Memory World arc, Atem couldn't summon the Egyptian Gods without the immense power of the puzzle. It can cast illusions, and can manipulate the minds and souls of others, such as when Yami Bakura put Bakura's soul inside of "Change of Heart" but Yami Yugi changed it to Yami Bakura's soul in the card. It can even interfere with the magic of other Millennium Items, and at its full power it can repel the dark Seal of Orichalcos.
Other lesser-known powers include protecting the user and others from harm and magical forces, and the ability to communicate with Duel Monster spirits. Also, it allows its owner to sense and feel thoughts and emotions, and to enter the minds of others. It can also sense impending danger and the great powers of other mystical artifacts and beings. During his tag-team duel with Joey against Para and Dox Yami Yugi was able to sense the power of the Gate Guardian monsters the brothers were preparing to summon, but didn't know what the pair of Eliminators planned to summon until it happened