In Yu-Gi-Oh, but Mechanical Ascension (1-148).

Summary

You Feng, a legendary duelist, is approached by Bei Ka Si, who praises him and invites him to collaborate on a new summoning method called "synchronization summoning." Becca, another key figure, agrees to You Feng's conditions, including the introduction of the "Extra Monster Zone." After finalizing their plans, You Feng receives a task to win a duel within three days to unlock the new summoning method. As he prepares, he learns of a young genius duelist, Ai De Fei Ni Ke Si, who has challenged him. The chapter culminates in a duel between You Feng and Ai De, with Ai De using a HERO deck, which surprises onlookers as they expect a more advanced strategy from such a renowned player.

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