Marvel is pleased to present your first look at Franken-Castle #21, from the red hot creative team of writer Rick Remender and artist Dan Brereton! The shocking conclusion to the tale of Franken-Castle is here! Castle has been terribly injured in his vicious battle with Daken and needs to heal on Monster Island. But when Frank's mind descends into madness, Elsa Bloodstone comes looking for him to take him out of his misery. Is this the end of Frankencastle...or the return of the Punisher? Find out in Franken-Castle #21!