Start year: 1986
Issues in volume: 150
X-Factor starred the original X-Men after the return of Jean Grey whom was presumed dead. With issue 71, the team shifted as the original 5 returned to the X-Men and Cyclop's brother Havok took on a new team of mutants. The series lasted for 149 issues, after which the series was replaced by Mutant X, following the adventures of Alex Summers.A second ongoing X-Factor series started in 2006, whic...
Publisher: Marvel
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