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

Summary

Kiana (Feng Mo) believes that the cycle of time is essential for saving the world, and she is seen as the end of civilization. You Feng, after a duel, receives a reward from his system, including a mechanical Synchro deck and cards like Formula Synchron and Acceleration Synchro Master. He reflects on the implications of unlocking new summon modes and the challenges ahead. Meanwhile, the group discusses the weakened state of their teacher, Da De, who reveals he is an artificial life form created through alchemy and is nearing the end of his existence. Da De hands You Feng a crucial card, the Philosopher's Stone - Saba, before passing away, leaving the group in a somber mood. You Cheng Shi Dai, who is now living next to You Feng, expresses his determination to fight alongside him, and You Feng emphasizes his preference for relying on his own skills.

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