Diamond Dust

Sora obtains the Diamond Dust keychain 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.

It shares the same name as the attack of the summon Shiva from the Final Fantasy series and an attack that Vexen uses in Kingdom Hearts: Chain of Memories.