Complex sentence: Lex Luthor appears in comic books and other media as a business magnate with immense wealth and corporate power, but he was originally depicted as a mad scientist who, in the vein of pulp novels, wreaks havoc on the world with his futuristic weaponry.
Split into simpler sentences: Lex Luthor appears in comic books and other media as a business magnate with immense wealth and corporate power. Luthor was originally depicted as a mad scientist who, in the vein of pulp novels, wreaks havoc on the world with his futuristic weaponry.