Complex sentence: The stories also relied on wilder, more far-fetched premises than were typical of "X-Men" at the time; locales included demonic dimensions, alternate futures, and an ancient Roman civilization hidden within the Amazon Rainforest.
Split into simpler sentences: The stories also relied on wilder, more far-fetched premises than were typical of "X-Men" at the time. Locales included demonic dimensions, alternate futures, and an ancient Roman civilization hidden within the Amazon rainforest.