Dark X-Men
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The Dark X-Men are a fictional team appearing in American comic books published by Marvel Comics. They made their debut during the crossover between Dark Avengers and Uncanny X-Men written by Matt Fraction, as part of the broader Dark Reign... Wikipedia
Members: Professor X, Emma Frost, Mystique, and more
First appearance: Uncanny X-Men #513 (September 2009)
Number of issues: Dark X-Men: The Beginning; 3; Dark X-Men; 5