Superman #44

NIGHT SHIFT CONTINUES! MYSTERY IN METROPOLIS! An old friend of Superman has gone missing in Metropolis. And they are not alone. Superman must show how he is not only a great hero but a great detective to uncover the truth behind a secret cult in Metropolis. But his search takes a deadly turn when he finds the cult worships a corrupted Black Lantern ring! One that tries to claim Superman as its new master! If Superman succumbs...Nekron will rise again!