Batman / Grendel: Devil's Masque (July 1993) by Comico and DC Comics
The true aggressive evil of Grendel is revealed as, in his malevolent quest to prove his superiority over Batman, he slaughters a squad of Gotham City cops and kidnaps an innocent child to use as a pawn in his cruel games of duplicity and murder. But the Dark Knight is not so easily duped, and Grendel's extreme actions set them both up for a chilling confrontation! Written and illustrated by Grendel creator Matt Wagner. Painted cover by Wagner. Prestige Format. Co-published by DC and Comico, the Comic Company.