Justice League Dark #7

Vampires across the world have gone berserk, attacking anyone and everyone with a pulse. Fearing her apocalyptic vision of the future has come to pass, Madame Xanadu mobilizes the team to intervene. But everything the JL Dark members know about how to slay a vampire is useless, for the world has changed.

Characters: Barbara Gordon, Batman, Cain (Vampire), Deadman, John Constantine, John Troughton, Madame Xanadu, Shade the Changing Man, Tig, Zatanna