When a Shadow Game starts, using the magic of the items, players would send themselves into an alternate dimension where their Duel won't be interrupted, and where cheating is forbidden, punishable by death. The most standard are granting a wish when being acquired, communicating with spirits (Duel Monster or human), casting Penalty Games on the loser of a Shadow Game that the owner played against. The Millennium Items grant their chosen owners access to ancient magic to use in Shadow Games.
This card later received an erratum to change its flavor text to remove any mention of the Millennium Items. The original flavor text for the " Millennium Shield" stated that it was a Millennium Item however, it has absolutely no importance to the storyline and does not originate from the Millennium Stone like the other Millennium Items.The Eyes Restrict Archetype contains cyclopes whose eyes resemble the Millennium Eye. " Millennium-Eyes Restrict" is covered in multiple Millennium Eyes.He carries a golden spear, axe and mace while not confirmed, these are implied to be the Millennium Items he uses. The Millennium Items are also mentioned in the description of " Sengenjin"." Ma'at" in the Yu-Gi-Oh! GX manga uses all 7 Millennium Items.Aigami primarily uses it to transport people to another dimension known as the Plana, but it can also be converted into a unique Duel Disk which he can use to Duel with. Quantum Cube - a mysterious item (bearing an Eye of Anubis like the other Millennium Items) possessed by Aigami in Yu-Gi-Oh! The Dark Side of Dimensions, and is identified as the "eighth Millennium Item".Millennium Shield - a high-defense monster card referring to a possibly real item.Pyramid of Light - an item containing Anubis's soul, greatly resembling the Millennium Puzzle.Feather of Ma'at - a tool used by the Pharoah's Priests to judge the hearts of criminals.