Inferno

Published in 1988-1989, 'Inferno' was a major crossover event in Marvel Comics that spanned multiple series, primarily focusing on the X-Men and related titles. Written by Louise Simonson and Chris Claremont, with art by Marc Silvestri, Walter Simonson, and others, the storyline involved a demonic invasion of New York City orchestrated by the demon N'astirh and the Goblin Queen, Madelyne Pryor. The event saw the transformation of various New York landmarks into demonic versions of themselves, and many Marvel heroes, including Spider-Man, Daredevil, and the Avengers, became embroiled in the chaos. Key characters included the X-Men, X-Factor, and the New Mutants, with significant plotlines involving the revelation of Madelyne Pryor's origins and her connection to Jean Grey. 'Inferno' had lasting impacts on the Marvel Universe, including the resolution of long-running storylines and the evolution of several characters. The event was critically acclaimed for its ambitious scope and dramatic storytelling. It consisted of numerous issues across different series, including 'Uncanny X-Men,' 'X-Factor,' and 'The New Mutants.'