A museum in Gotham is holding an exhibition of famous murderers, including as its prize exhibit the bones of Hunter Rose [Grendel]. Grendel-Prime's experiment had thrown him back in time, and he reappeared in the museum, drawn by the "true skull". With the aid of a kidnapped Waynetech engineer he builds a device intended to send him back to his own time, but also to kill thousands in a blood sacrifice intended to contact Hunter Rose's soul.2 issues, 45mb
Grendel/Batman
