The X-Men's world goes up in flames as the most incendiary mutant crossover of all begins! X-Factor, the New Mutants, the newly-minted X-Terminators and even Power Pack all feel the heat as the Machiavellian geneticist Mr. Sinister and the demon lord N'astirh set their respective sights on Cyclops' wife, Madelyne Pryor! Collecting: Power Pack (1984) 40, 42-43; X-Factor (1986) 33-36; X-Terminators 1-4; Uncanny X-Men 239-240; New Mutants (1983) 71-72
