The granted resistance to "Numbers" when Number 96 tried to take " Utopia" from Bronk Stone by force, and when Bronk Summoned "Utopia". [10] When Shark had the Key and took control of Kite Tenjo's " Acid Golem". [3] As the RPG replayed Atem's life, Thief King Bakura managed to steal it again. He once again gathered the Items and Summoned Zorc. However, when Yugi and his friends were able to help Yami learn his original name, Atem managed to summon Holactie the Creator of Light, destroying Zorc without sealing him into the Puzzle or shattering it. Takahashi, Kazuki (1997-03-09). " 遊闘 ( バトル ) 1 神 ( かみ ) のパッズル" (in Japanese). Yu-Gi-Oh!. 1. Shueisha. ISBN 4-08-872311-2. The Pendant is connected to Pendulum Monsters, as it changed the three Effect Monsters in Yuya's hand (" Stargazer Magician", " Timegazer Magician", and " Odd-Eyes Dragon") to Pendulum Monsters, as well as several of Yuya's other monsters later on. [1] It also most likely created nearly all of Yuya's other Pendulum cards, as he is seen using them before Leo Corporation started producing them. 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 (in the anime) 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.

The Emperor's Key gives the user some resistance to the influence of the "Numbers". [10] [3] It has at least once failed to fully suppress the power of a "Chaos Number", For example: When Yuma took control of " Number C32: Shark Drake Veiss" via " Rivals Unite", it was causing him great pain until Shark used " Underwater Snow Prison" to banish it from the field. [11] The box containing the Puzzle's pieces had two messages written on it, " The person who solves this puzzle will have their wish granted." and " The one who solves me, will receive my dark knowledge and power."

After the RPG ended, Yugi returned to the real world and once again had the Puzzle, which was laid to rest, before the Ceremonial Battle. After the battle the Puzzle, along with the other items, was buried underground in pieces.

However, the Key was unable to fully suppress the power of a "Chaos Number" when Yuma took control of " Number C32: Shark Drake Veiss". Though the "Chaos Number" did not possess him, the connection to it weakened Yuma and surrounded him in a dark aura which was eventually electrified, causing him great pain. Vetrix pointed out that if Shark did not do something, Yuma would be taken over by the "Number" like he was. [11] World Duel Carnival [ ] The Emperor's Key (皇の鍵, Ō no Kagi), sometimes shortened to the Key in both versions and also called the Golden Key in the dub, is a pendant that originated from the Astral World in the Yu-Gi-Oh! ZEXAL series. In Reshef of Destruction, the ritual to revive Reshef the Dark Being scatters the Millennium Items, including the Puzzle, across the globe. Yugi is frantic to find it and save his other self. It's eventually revealed that Bandit Keith came into possession of the Puzzle; he uses it and the other Items in a ritual to attempt to awaken Ra. When this attempt fails, the Puzzle is taken from him and Yami Yugi reemerges, frying Keith with lightning from Ra.Yugi managed to solve the Puzzle, while under the pressure of getting money to pay Ushio's self-imposed bodyguard fee. [5] [6] After solving it, his body bore host to part of Atem's soul, known as Yami Yugi. Things to do: Re-live the Story of ZEXAL!". https://tcg.konami-europe.com/coverage/ . https://tcg.konami-europe.com/coverage/things-to-do-re-live-the-story-of-zexal/ . Retrieved September 6, 2014. Takahashi, Kazuki (1997-05-06). " 遊闘 ( バトル ) 13 エジプトから 来 ( き ) た 神 ( おとこ ) 〈 前 ( ぜん ) 編 ( ぺん ) 〉" (in Japanese). Yu-Gi-Oh!. 2. Shueisha. ISBN 4-08-872312-0. The Pendant was later stolen from teenage Atem, by Thief King Bakura, who used it and the other Millennium Items to Summon Zorc Necrophades.

Takahashi, Kazuki (2003-03-09). " 遊闘 ( バトル ) 302 奇 ( き ) 襲 ( しゅう ) ‼ 奇 ( き ) 襲 ( しゅう ) ‼" (in Japanese). Yu-Gi-Oh!. 34. Shueisha. ISBN 4-08-873492-0. The Puzzle grants incredible skill at strategy and allows the wielder 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. A fake Millennium Puzzle, called the Millennium Pendant was used by Titan in his duel against Jaden Yuki. [13] [14] Non-canon Appearances [ ]When Yuma Dueled against Fender, Astral (who was in the key) was electrocuted at times when Yuma's Life Points went down. [18] When Yuma and Ray Dueled against Girag, Yuma threw the key out of the Barian's Sphere Field to Tori once Astral was weakened from the effects of the field. [19] After their Duel with Number 96, Astral was forced to return to Astral World and the key went with him, falling through the portal. [20] A diabolical door has haunted Yuma in his dreams trying to convince him to open it. The Emperor's Key was also the key to open that door, which released both Astral and the "Numbers"; and to do so, the broken key restored itself. [8] When the Key got separated from Yuma, a voice said that "Astral is immersed in the guidance of time" and that he must obtain the power of " ZEXAL". The voice described it as a power that turns all darkness into light. [3] The Key has the power to release the alternate form, of a "Number" - " Chaos Number". [12] Mokuba Kaiba played Russian Roulette dinner against Yugi and Jonouchi. Dark Yugi realized that Mokuba was cheating by using a hidden switch in a syrup bottle, so he attached the Millennium Puzzle to the turntable so that it smashed the syrup bottle as it spun. [10]