Stardust

Stardust (スターダスト) is one of Xigbar's weapons in Kingdom Hearts 358/2 Days. It can be upgraded to Stardust+.

Trivia
In the Final Fantasy video game series, Stardust appears as an item in  Final Fantasy IV,  Final Fantasy VII,  Final Fantasy IV: The After Years, and  Final Fantasy XII. It appears as an ability in  Final Fantasy Tactics Advance and  Final Fantasy Tactics A2: Grimoire of the Rift.