While a Wham! Episode can change a single series forever... sometimes, something comes out that forever alters an entire genre. It wasn't the first entry into the genre, nor was it the last, but things were never the same after it came out. This often -- but far from exclusively -- happens with particularly notable Deconstructions; for example, superhero comics after Watchmen. If it does happen with a Deconstruction, it generally results in years' worth of both Darker and Edgier (and possibly Contemplate Our Navels) series in imitation... and Reconstruction series in response.