Action Comics (1938) #789

Evil stuff is spewing out of the Gorge, a giant hole in the earth left over from "Our Worlds at War." In the middle of it all, General Zod's minion Kancer comes after Superman, but instead finds Krypto protecting his master. When Superman arrives, he discovers someone guarding the Gorge ? someone left behind after the war, who feels betrayed by the Man of Steel