How does Monte Cristo’s ultimate vengeance against Villefort prove to be more than he bargained for, and how does it change him even further?

The Count must combat a final emotion. This emotion is guilt. He doubts his role as divine justice because an innocent boy, Edouard, fell as its victim unintentionally. The Count makes a voyage to the Chateau D'If, now a tourist attraction to remind himself of his suffering. When he is told that he was known as prisoner Number 34, he thinks of Villefort. Villefort must have been haunted by that number in his sleep. Monte Cristo consequently feels no pity for the men who incarcerated him. He thus sets off for Italy to finish Danglar's ruin.