X is a mutant in the Marvel Universe. The character, created by Essad Ribic, first appeared in The Brotherhood #1. Within the context of the stories, X is a member of the Brotherhood of Mutants.
X is a mutant in the Marvel Universe. The character, created by Essad Ribic, first appeared in The Brotherhood #1. Within the context of the stories, X is a member of the Brotherhood of Mutants.