Uncanny X-Men #28 Paco Medina Variant

Our wildest UNCANNY story yet continues! A mysterious turn of events brings the NEW MUTANTS to the UNCANNY X-MEN, and the Outliers are nowhere to be found! All this plus the SECRET of Graymalkin Prison's INMATE X revealed at last! Who is this incredibly lethal mutant powerhouse, and what does it mean for mutantkind?