Mu You transmigrated into a world where everyone dueled, becoming someone else's guardian spirit.
At first, seeing everyone hack away at each other with Axe Raiders, Mu You planned to make a name for himself and become a true King of Duels. But when he discovered that this world had no Synchro Summons, no Xyz Summons, and barely any Fusion Summons, he began to despair at the slow-paced format.
[Change this slow format! Print some cards, kid! Become a true King of Custom Cards!]
As a guardian spirit, Mu You smiled faintly. It was time to speed things up!
Kaweier: Just like this, using the cards Mu You left me, I fight to survive! This is my struggle!!! Sebad Dragon!!!!
Aidel: When Mu You was still around, he often told me, "A hero needs a stage to fight on!" I activate the Field Spell, Skyscraper!
Yusei: I activate Shooting Star Dragon's effect! One hit! Two hits! Three hits! Four hits! Five hits! Mu You, did you see that? This is my Shooting Star Five-Strike Combo!
Mu You looked on with satisfaction at the people he'd brought along. It seemed they no longer needed him to step in and duel for them.
