Madelyne Pryor
Madelyne Pryor was introduced during the acclaimed 1983 "Uncanny X-Men" run that saw long-time writer Chris Claremont pair with artist Paul Smith for a series of issues that would see the Jean Grey look-alike marry the retired X-Men leader Scott Summers (Cyclops).
Inferno (Marvel Comics)
"Inferno" was a Marvel Comics company-wide crossover storyline in 1989 that mainly involved the mutant titles, namely "Uncanny X-Men", "X-Factor", "X-Terminators", "Excalibur", and "The New Mutants". The story concerned the corruption of Madelyne Pryor into the Goblin Queen, the final transformation of Illyana Rasputin into the Darkchylde, the demonic transformation of Hobgoblin, and a demonic invasion of New York City. The series was written by Louise Simonson, Chris Claremont, Steve Engelhart, Gerry Conway, David Michelinie, Ann Nocenti, Walter Simonson, Jon Bogdanove, Terry Austin, and Julianna Jones.