Plot
As Underworld Unleashed engulfs the DC Universe, Neron's corrupting influence has intensified the madness and evil already concentrated within the walls of Arkham Asylum. Into this deadly mix comes a new inmate who has poisoned the Asylum's other residents, and the antidote carries a price only Batman can pay...with his soul! Written by Alan Grant. Art by Brian Stelfreeze and Rick Burchett.