Page "Zatanna" Paragraph 10

In Detective Comics # 833 ( August 2007 ), it is stated that Zatanna's father was a friend of Thomas Wayne.

Zatara trained Bruce Wayne in the art of escape ; and Bruce and Zatanna were childhood friends ( although Batman believes that he has never met in her Justice League of America # 51, and her only memory of meeting him is while she was disguised ).

Bruce helps Zatanna investigate the death of one of her former assistants ; all clues point to a performer named Ivar Loxias.

However, Loxias is revealed to be the Joker in disguise ; he shoots Zatanna in the throat and incapacitates Batman.

Zatanna is able to heal herself by writing a curing spell in her own blood, and she is instrumental in foiling the Joker's scheme.

Bruce puts Zatanna's betrayal behind him, allowing the two to renew their friendship.