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

Summary

You Feng faces Ai De Fei Ni Ke Si in a high-stakes duel, with Ai De's life points dwindling. Despite being on the brink of defeat, Ai De vows to turn the tide with a powerful counterattack. You Feng, aware of the risks, decides to eliminate Ai De's chances of recovery by summoning the formidable Xyz monster, Super Heavyweight Cannon Train - Gustav Max, using two 10-star monsters. With a dramatic flourish, You Feng activates the cannon's effect, dealing 2000 points of damage to Ai De and securing his victory. As the crowd reacts in shock and admiration, Ai De acknowledges the gap in their skills and expresses his desire to improve. You Feng encourages him to explore the potential of his D-HERO deck, particularly a powerful card, Gorefiend-D. After their match, Ai De leaves with renewed determination to challenge You Feng again in the future. Meanwhile, You Feng notices the desolate state of You Cheng Shi Dai's dormitory, learning that his roommates have moved on to other opportunities, leaving him alone.

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