"Doom Metal" part one of five-the Dark Nights: Death Metal tie-in that will directly impact the finale of that event! Nightwing's on a mission to free the Legion of Doom from Perpetua's clutches. But to do so, he'll need the help of none other than-Lex Luthor?! The surprises are only just beginning, as Nightwing, Lex, and a new Justice League must fight their way through an Earth twisted by the Dark Multiverse. Titans will be tested, hearts will be broken, and blood will be spilled!