Number F, short for Future Number (
During the final Duel against Astral, Yuma managed to create "Number F0: Utopic Future" by relying on his own power and potential. This card symbolized his belief in the future of the three worlds which he wanted to inspire in Astral. After the latter Summoned "Number 99: Utopic Dragon", Yuma merged with "Utopic Future", proceeding to defeat Astral and end the Duel in one final attack.
So far, 3 Number F monsters are known to exist. They all share the number "0".
|No.||Symbol||Monster||Neutral form||Owner(s)||Base Number||Number location|
|0||Utopic Future||None||Yuma Tsukumo||None||Center of chest|
|0||Utopic Future Slash||Unknown||Unknown||Utopic Future||Center of chest|
|0||Utopic Draco Future||Unknown||Unknown||Utopic Future||Center of chest|