Superman - Action Comics The Oz Effect

Shrouded in mystery for years, the puppet master known as Mr. Oz has finally shown his hand. His agents have begun to move as the Man of Steel works to stop the chaos they unleash in Metropolis and across the globe. But when Mr. Oz steps out from the shadows, his identity rocks the Last Son of Krypton to his core. Who is he? The answer will change Superman forever.