Action Comics: Rebirth Book 2
Lex Luthor is under attack-and only Superman can save him! When the world's most ingenious scientific mind took on the mantle of Metropolis' new Man of Steel, the world took notice-and so did the mysterious Godslayer! Then the Man of Steel turns his attention to uncovering the mystery of the human Clark Kent living and working in Metropolis.
Collecting issues #967-984.