Nabu is a powerful magic-user and prominent member of the Lords of Order, born on the planet Cilia. He is the being who gives Doctor Fate his powers, using Fate as an agent on Earth. In some incarnations of this hero he has used mystical artifacts to actually control Doctor Fate, taking over the mind of a host's body. These artifacts include the Amulet of Anubis, the Cloak of Destiny and the Helmet of Fate.
Nabu was created by Gardner Fox and Howard Sherman, first appearing in More Fun Comics #67. (1941)