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

Summary

You Feng showcases his skills in a duel classroom by performing a special XYZ summon, transforming his level 10 Machine-type monster, "Superheavy Samurai Railroad Train - Gustav Max," into the more powerful "Superheavy Samurai Railroad Train - Super Dreadnought." This new monster boasts impressive stats of 4000 attack and defense. His peers are astonished, especially when he humorously names the monster "Sky-Breaking Giant Love." You Feng reveals that while the cannon's attack is powerful, it can only be used once per turn. However, he cleverly explains that this doesn't limit the card's overall utility. He then proceeds to summon two "Mecha Troop - Annihilation Heavy Armament" monsters, dramatically increasing his attack power. Utilizing a spell card, he recovers "Gustav Max" from the graveyard and performs another XYZ summon, bringing the formidable cannon back into play, leaving his opponents in awe and fear.

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