Diamond Dust

The Diamond Dust (ダイヤモンドダスト) is a keychain which Sora obtains after defeating the Ice Titan in the Gold Match. This Keyblade is a Kingdom Hearts: Final Mix exclusive along with the One Winged Angel Keyblade. It is also a weapon in Kingdom Hearts: Chain of Memories. You receive it by opening a treasure chest in a Calm Bounty room in Castle Oblivion after defeating Marluxia. Alternatively, for Re:Chain of Memories, you may obtain it in a Moogle Room in Castle Oblivion after saving clear data.

The Keyblade appears to be made of ice, and the teeth and Keychain are snowflakes. It bears some resemblance to the Oathkeeper Keyblade.

It shares the same name as one of Vexen's and Aqua's techniques, as well as the traditional technique of the summon Shiva from Final Fantasy.