A new heroine named the Black Widow joins the team and shows the boys she can kick butt even better than them. But we soon learn she is really the shape-shifting Mystique, sent by Doom to infiltrate and get at the fractals. She nearly succeeds and leads the Squad into a Lethal Legion ambush. But Nick Fury may just have provided their ace in the hole Screaming Mimi turns on the villains, revealing herself to be an undercover SHIELD agent named Songbird!
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