As an item, a player wearing it will always be under the effect of the "Reflection" spell, protecting the wearer from attack-type spells and will be able to undo curses placed on cards he touches. It also means that cards under the spell effect of "Fake" or "Transform" will return to their original forms. It can be obtained in the monthly tournament in Antokiba.
Greed Island arcEdit
When Gon's group retrieves the necklace, Gon wore it to prevent their cards from being stolen by spell cards. But after using it to reveal a fake Favor Cushion (G.I card) traded by Michiro, Gon used the necklace on the Sick Villagers to remove their illness, which resulted in obtaining the designated the Wild Luck Alexandrite as a reward. After clearing the game it is one of the three cards that Gon took out of the island to un-transform the "Plot of Beach (G.I card)" to an "Accompany (G.I card)" spell card.