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In "Superboy" #135, the story introduces the villain Mechano-Master, who has invented the Dart-Bomb, a weapon capable of penetrating Superboy’s invulnerable skin. This comic showcases an intense clash as Superboy faces off against this new threat. The cover art effectively captures the explosive danger posed by the Dart-Bomb.
Keywords: Superboy DC Comics comic book 1967 vintage comic superhero collectible Silver Age graphic novel nostalgia