Finest Fantasy 13

Finest Fantasy 13 (究極幻想13) is Luxord's joke weapon from Kingdom Hearts 358/2 Days. They are gigantic CDs, depicting the Nobody insignia and the Roman numeral for 13 (XIII), a reference to Organization XIII.

Finest Fantasy 13 is one of only 4 of Luxord's weapons that's name is not drawn from one of 22 cards that make up a Tarot deck's Major Arcana. The others are The Joker, Fair Game, and High Roller's Secret.

Trivia

 * "Ultimate Illusion" as a play on "Final Fantasy" has also been used in Final Fantasy XII and Dissidia: Final Fantasy as moves used by Gilgamesh and Chaos, respectively.
 * As revealed by Tetsuya Nomura in Kingdom Hearts 358/2 Days Ultimania, this weapon's name was originally intended to be "Ultimate Delusion 13" (究極妄想13), but the idea was scrapped due to the complaints of the overseas translators.
 * In the upcoming game "Final Fantasy XIII", a Eidolon, Carbuncle is seen emerging from a disc so it could be related to Final Fantasy XIII.