Complex sentence: The narrative is written in the first person, like a memoir, describing the inner monologues of the two protagonists, which serves to foil and "blur the distinction" between the superheroes and the supervillian.
Split into simpler sentences: The narrative is written in the first person, like a memoir, describing the inner monologues of the two protagonists. The duel narratives foils and "blur (s) the distinction" between the superheroes and the supervillian.