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

Summary

You Feng faces DARKNESS in a duel, where DARKNESS summons the powerful Red-Eyes Black Dragon, intending to claim victory. Despite the initial shock, You Cheng Shi Dai and Marutou Ryou recognize the dragon as a Normal Monster and underestimate its threat. DARKNESS uses a spell card, Black Flame Bullet, to inflict significant damage on You Feng, reducing his life points dramatically. As the duel progresses, You Feng struggles against the Dark Duel's restraints but manages to summon his own powerful monster, Sebadoragon, and then sacrifices it to summon the legendary Dark Magician. This unexpected move surprises both his allies and DARKNESS, who acknowledges You Feng's strength and the mysterious power behind his new monster.

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