A two-part Batman/Grendel crossover, Devil’s Riddle and Devil’s Masque, was written and drawn by Wagner and colored by Wagner at the time of the Comico series, but was delayed by Comico’s bankruptcy. It was finally published by DC in 1993.
The story assumes that Hunter Rose and Batman live in the same fictional universe and are contemporaries. Bored with Argent the wolf and the NYPD, Hunter Rose comes to Gotham City to challenge the city’s protector to stop him before he commits an audacious crime. Hunter Rose becomes increasingly impressed with Batman but is still able to pull off his crime. However, Batman’s interference proves to be more trouble than he expected and Grendel winds up unintentionally endangering the life of a child and indirectly causing the death of a person he did not consider an enemy. Grendel and Batman’s final battle ends with the assassin just barely escaping Gotham, his arm broken by the Dark Knight in the process.
Although this story can be seen as out of continuity, Hunter Rose is depicted with a broken arm in the “Devil’s Advocate” short, featured inGrendel: Black, White, & Red.