Create a single, ultra-stylized and highly detailed katana. The blade should be long, curved, and elegant like a traditional samurai sword. The handle must be a sculpted dragon, with detailed scales, claws, and a fierce expression. The katana should have ornamental engravings, glowing accents (optional), and use clean, flawless topology with realistic PBR textures. Make sure the model is beautiful, well-proportioned, and without any mesh errors.